Science week activities for primary school cover hands-on experiments, STEM challenges, themed investigation days, and school-wide science fairs. These events let children aged 4 to 11 explore topics like space, the human body, food chains, and physical science through practical tasks that spark curiosity and develop problem-solving skills.
British Science Week, held each March, gives out free activity packs for primary schools covering Early Years through to secondary level. As a UK educational platform, LearningMole shares curriculum-aligned science videos and resources that fit well with these activities. Michelle Connolly, founder of LearningMole and a former primary teacher with over 15 years in the classroom, says, “science week gives children the freedom to ask questions and explore answers in ways that feel exciting rather than like typical lessons.”
Whether you plan a single day or a whole week of science, picking hands-on experiments that match your year group’s abilities and interests makes all the difference. Ready-made resources can make planning memorable experiences much simpler.
Key Takeaways
Science Week gives your school a focused chance to celebrate practical investigations and build children’s confidence in asking scientific questions. British Science Week 2026 happens in March and provides free resources, funding opportunities, and a national framework for planning.
Science Week is an annual celebration that encourages primary schools to focus on hands-on investigations across science, technology, engineering, and maths. Your school can join British Science Week, Ireland’s Science Week, or run your own dedicated week of activities.
The week works best when you link it to your existing curriculum. Year 3 children studying rocks and soils can extend learning through outdoor investigations. Year 5 classes exploring forces benefit from practical sessions they usually don’t have time for.
Many schools invite visiting scientists, run mixed-year workshops, or host parent showcase events during Science Week. This structure raises science’s profile across the school and reminds children that scientific thinking matters beyond just Friday afternoons.
British Science Week is run by the British Science Association and gives out free activity packs, planning resources, and grant funding for primary schools. The organisation helps teachers with investigation ideas that link directly to National Curriculum objectives.
Schools can apply for Kick Start Grants from £100 to £500 to fund workshops or buy materials for investigations. This funding lets you offer exciting experiences without blowing your science budget. The British Science Association website lists application deadlines and who can apply.
The week connects your school to a wider movement. Over 5,000 UK schools usually take part, opening up chances to share findings online and celebrate scientific achievement across the country.
British Science Week 2026 runs from 6th to 15th March. The theme encourages children to look at how things change in the world around them through chemical reactions, forces, materials, and biological adaptation.
This theme fits well with Key Stage 1 materials work, Year 4 states of matter, and Year 6 evolution. You can tweak the theme for any year group by focusing on changes children can observe and investigate themselves.
Start planning in January so you have time for grant applications and ordering resources. Book external workshops early, as visiting scientists and STEM providers get booked up fast for this week.
Success comes from setting clear goals, matching activities to student abilities, and building excitement across all year groups.
Begin by deciding what you want students to get out of the week. Maybe you want to boost confidence in scientific enquiry, connect classroom learning to real life, or spark interest in STEM careers.
Tie your goals to the National Curriculum. For Year 2, focus on materials and their properties through sorting activities. Year 5 students could explore forces with building challenges that reinforce physics learning.
Write down three to five outcomes you want to see. These might be skill-based, such as better teamwork during experiments, or knowledge-based, like understanding the water cycle. Clear objectives help you pick the right science week activities and see if the week worked well.
Pick experiments and challenges that students can manage and understand. Reception and Year 1 pupils love sensory experiences like colour mixing or growing cress seeds. They need simple steps and quick results to keep them interested.
Key Stage 2 students can try more complex investigations. Year 4 might build circuits or create erupting volcanoes, while Year 6 could design water filters or investigate chemical reactions.
Think about what each activity needs. Do you need special equipment or can you use what you already have? Some great science week ideas use just paper, tape, and household bits for engineering challenges. Budget constraints often nudge teachers toward these creative, low-cost options that work just as well.
Always put safety first. Check CLEAPSS guidance for any experiments with heat, chemicals, or sharp tools. Plan for enough adult supervision depending on the activity’s risk.
Pick a shared theme to link activities across all year groups. A ‘Space Exploration‘ theme might have Reception children making moon craters in sand, while Year 6 builds model rockets. This approach builds excitement and gives the week a sense of unity.
Invite parent volunteers and local STEM professionals to run workshops or help with demonstrations. Many scientists, engineers, and doctors enjoy inspiring young learners. Send invitations four to six weeks ahead to secure their help.
Plan a showcase event on Friday afternoon where students share their discoveries with parents and other classes. This could be a science fair with display tables or an assembly with demonstrations. You might use STEM Resources to help students prepare their presentations.
Assign roles to staff. One teacher runs daily assemblies, another manages materials, and someone else takes care of photography and social media. Sharing the workload keeps things running smoothly and stops anyone from burning out.
Free packs from the British Science Association offer structured activities based on the 2026 theme ‘Curiosity: what’s your question?’ Hands-on experiments help pupils explore scientific ideas through practical work.
The British Science Week 2026 Primary pack is free to download. These packs include activities for different age groups, from early years up to Key Stage 2.
You can also find packs from previous years if you want more ideas. The 2025 pack focused on ‘change and adapt’, 2024 explored ‘time’, and 2023 covered ‘connections’. These themes still give you plenty of cross-curricular activities to use alongside current resources.
Most activities use materials you already have in school, so you don’t need to buy lots of special kit. The resources link science to other subjects like English, maths, and art.
The 2026 theme ‘Curiosity: what’s your question?’ encourages pupils to think about what they want to discover about the world. This approach suits both Key Stage 1 and Key Stage 2, since children naturally ask questions about their surroundings.
You can fit pack activities into your lesson plans or set aside time during the 6th to 15th March 2026 celebration. The activities support cross-curricular learning, so you might combine a science investigation with a writing task or a maths lesson on measuring results.
Many teachers use the packs to kick off a school-wide science week. Each year group explores different questions but works towards the same theme. Pupils might make posters, run experiments, or present findings to other classes.
Practical investigations help children grasp scientific ideas through direct experience. Simple experiments like testing insulation or checking heart rates after exercise use basic resources but deliver strong learning.
Year 3 pupils studying forces can build rubber band cannons from Pringles tubes and elastic bands. Children test different variables, like projectile type, launch angle, or pull-back distance. This kind of investigation builds working scientifically skills and keeps costs low.
Key experiment ideas include:
LearningMole has free curriculum-aligned science videos that show investigation techniques and explain topics like forces, materials, and living things. These videos work well as introductions before pupils start their own experiments.
Hands-on experiments, outdoor explorations, and creative challenges help children connect with science in ways that stick. These activities work well in classrooms, at home, or during science week.
Practical science experiments make abstract ideas real. Classic activities like making a baking soda and vinegar volcano remain favourites because they create a visible reaction that grabs attention.
You can explore density with a layered liquid experiment using honey, washing-up liquid, water, and oil. Children pour each liquid into a clear container and watch as they settle into layers based on density.
Static electricity experiments are always a hit with Year 3 and Year 4. Rub a balloon on wool and watch it pick up bits of paper or make hair stand up. These activities tie in with National Curriculum requirements for working scientifically.
Skittles colour diffusion is a great investigation for younger children. Arrange Skittles in a circle on a plate, add warm water to the centre, and watch the colours spread. It’s a simple way to show solubility and makes a colourful pattern that children love to photograph.
Science feels different outdoors. You connect what you learn in class to the world right outside your school. Bug hunts with magnifying glasses sharpen observation skills and fit perfectly with the Key Stage 1 animals curriculum.
Set up a weather station in your playground. Children measure rainfall with a plastic bottle rain gauge and check wind direction using a handmade weathervane. They record temperature throughout the day. Collecting this data builds maths skills alongside science.
Try shadow investigations on sunny days. Trace a child’s shadow at different times and measure how it changes. Year 5 and Year 6 pupils can relate this to Earth’s rotation and how the sun appears to move.
Plant growth experiments teach patience and careful watching. Grow cress on different surfaces or in various light conditions. Children record daily changes and compare results, learning what plants need to survive.
Blending art with science makes lessons memorable and brings out different strengths in your class. Chromatography butterflies mix colour theory and chemistry. Children draw patterns on coffee filters with washable markers, then spray them with water to watch the colours separate.
Make galaxy jars using cotton wool, glitter and food colouring in water. Children build up layers of blue and purple, creating a tiny universe in a jar. This introduces space topics and helps develop fine motor skills.
Leaf printing with paint shows off the delicate vein patterns that move water through plants. Press painted leaves onto paper to make detailed prints. This links to Year 3 plant nutrition in a creative way.
Grow salt crystals on pipe cleaners for a bit of wow factor. Shape the pipe cleaners, dip them in a supersaturated salt solution, and wait a few days for crystals to appear. Chat about volcano facts and how minerals and rocks form.
Quizzes work brilliantly as science week ideas and get the whole class involved. Write multiple-choice questions about famous scientists, discoveries or topics your class has covered.
Picture quizzes are great for younger children. Show images of plants, animals or materials and ask pupils to name or sort them. This boosts classification skills from the National Curriculum.
True or false games get everyone moving. Read out science facts and ask children to move to different sides of the room depending on their answer. The movement keeps the energy up.
Team quizzes encourage collaboration. Split the class into small groups and give points for right answers. Cover a range of science topics so everyone gets a chance to shine.
Animals and plants develop special features to survive in their environments. Chemical reactions change substances into new materials. Species evolve over millions of years through natural selection.
The British Science Week 2025 theme ‘Change and Adapt’ offers loads of ways to explore these fascinating science ideas with your primary class.
Living things have brilliant features that help them survive where they live. Polar bears grow thick fur and have layers of fat to stay warm in the Arctic. Cacti store water in their chunky stems to make it through dry spells in the desert.
You can explore adaptations with hands-on activities that fit the Key Stage 2 curriculum. Ask your class to look at different bird beak shapes and link them to food sources. Finches use strong beaks for cracking seeds, while hummingbirds have long, thin beaks for sipping nectar.
Workshops about how adaptation shapes life on Earth help students understand resilience and change through hands-on experiments. Set up stations where children compare how animals cope with extreme temperatures, little water, or special diets.
Plant adaptations are just as interesting. Compare leaves from different places: broad leaves catch more sunlight in forests, while small waxy leaves lose less water in dry areas. Let pupils observe how plants change and adapt their growth when you put them in different light for a few weeks.
Chemical changes create completely new materials that you can’t easily reverse. Mix vinegar and bicarbonate of soda and you’ll make carbon dioxide gas. This shows how substances change and adapt their properties in reactions.
Let your class see chemical changes with safe, simple experiments. Baking bread shows how yeast makes bubbles that help dough rise. Rusting shows iron reacting with oxygen and water to form something totally different.
Activities about how things change in chemical reactions match the Year 5 National Curriculum. Try showing irreversible changes by burning a candle, cooking an egg, or mixing plaster of Paris.
Make a comparison table with your pupils:
| Physical Change | Chemical Change |
|---|---|
| Melting ice | Burning wood |
| Dissolving sugar | Rusting metal |
| Breaking glass | Baking a cake |
| Boiling water | Vinegar and bicarb reaction |
Colour changes often mean a chemical reaction has happened. Purple cabbage juice changes colour when mixed with acids (it turns pink) or alkalis (it goes green). This gives a clear, visual way to see how substances adapt when you combine them.
Evolution shows how species change and adapt over generations. Animals and plants with useful features survive and pass them on to their young.
Charles Darwin noticed finches on the Galápagos Islands had different beak shapes depending on their food. Birds with the right beaks survived better and had more babies. This is natural selection in action, where helpful adaptations become more common over time.
Model natural selection with a fun classroom activity. Give children different tools (tweezers, spoons, chopsticks) to pick up objects as pretend food. Those with the best tool for the job collect more, just like animals with the right adaptations thrive.
Fossils show how life has changed over millions of years. Show your class that ancient horses were much smaller than today’s horses. This helps children see how animals adapt to changing environments. LearningMole has free video resources with animations that explain evolution for Key Stage 2 pupils.
Peppered moths give a real-life example of quick adaptation. During the Industrial Revolution, darker moths survived better in polluted places because predators couldn’t spot them on soot-covered trees. When the air got cleaner, lighter moths returned.
Humans also drive species to change and adapt fast. Bacteria develop antibiotic resistance. Some city birds now avoid roads during rush hour. Living things are always responding to new pressures.
Children really learn when they can see and touch how their bodies work. These activities help them understand body systems, explore senses, and find out what keeps them healthy.
Bring the circulatory system to life by making a working heart model with plastic bottles and straws. Children pump water through the tubes and see how blood moves. This hands-on method helps Year 3 and Year 4 students grasp how the heart works as a pump.
Show the respiratory system with simple breathing exercises. Students measure lung capacity by blowing up balloons and comparing sizes before and after exercise. Teachers often use this to connect physical activity to how the body works.
Model the digestive system using clear plastic bags and everyday foods. Children mash up crackers and water to mimic stomach digestion, then squeeze the mixture through tights to show how intestines work. Learning inside the human body helps students see how these systems link together.
Build the skeletal system with pasta and marshmallows. Students create bone structures and learn about joints and movement. This supports Key Stage 2 science on how the skeleton supports and protects us.
Let children develop their sense of touch with texture sorting games. Blindfold students and ask them to identify objects just by touch. Use things like sandpaper, velvet, ice cubes, and warm water. This activity fits the National Curriculum’s focus on learning about the world through our senses.
Taste testing shows how the tongue detects different flavours. Set up stations for sweet, salty, sour, and bitter foods. Students note which parts of their tongue react most. Many teachers add smell tests to show how senses work together.
Try sound experiments with tuning forks and water. Children dip vibrating forks into water and watch the ripples. They can also make string telephones to find out how sound travels. This links to Year 4 science about sound waves.
Vision activities include colour mixing and optical illusions. Students spin colour wheels to see how eyes blend colours. Simple illusion cards show how our brains interpret what we see.
Use glitter or UV gel in hand washing experiments to show how germs spread. Students shake hands with glitter on their palms and track where it ends up. They compare washing with water alone and with soap. This practical demo encourages good hygiene.
Let children measure their pulse before and after exercise to see the impact of activity. They record heart rate changes and talk about why exercise strengthens the heart. Year 5 students can graph their results, building maths and science skills together.
Nutrition activities work well with food sorting games. Children group items into categories and plan balanced meals. Teachers often use empty food packaging for a more realistic feel. Students learn about vitamins, minerals, and energy.
Track sleep with weekly diaries. Children note how much they sleep and how they feel each day. They spot links between sleep and energy. This supports personal, social and health education across Key Stages 1 and 2.
Children learn best when they see how energy moves through nature and watch living things interact. These activities turn abstract ideas into hands-on learning that sticks with them long after Science Week finishes.
Making food chain models helps Year 2 and Year 3 pupils understand how energy passes from one organism to another. Start by teaching the basics: producers (plants), consumers (animals), and decomposers (organisms that break down dead stuff).
Try cut-out images or drawings in sequence. Children build chains starting with grass, then a grasshopper, a bird, and finally a fox. This shows how each organism depends on the one before it.
For something different, use edible food chain activities. Cereal stands in for plants, raisins become small animals, and bigger items represent top predators. Children arrange these on paper plates to build their chains.
Create a winter food chain mobile showing which animals stay active in colder months. This links to life cycles and seasonal changes that affect species through the year.
Let your class explore small ecosystems by looking closely at outdoor spots or building mini habitats indoors. Take pupils outside to observe a patch of soil, a tree trunk, or the edge of a pond. They record what lives there and how these organisms interact.
What to look for:
Build a classroom terrarium for a contained ecosystem children can watch over time. Use a clear plastic box with soil, small plants, and perhaps some woodlice or worms. Pupils see how water cycles through condensation and how plants grow with available light.
These hands-on ecosystem activities match Key Stage 1 and 2 science goals about habitats and interdependence. Children build observation skills while learning that every part of an ecosystem matters.
Students learn about the universe and basic physics through hands-on experiments. These activities suit Year 3 to Year 6 and fit with Key Stage 2 science aims.
Start with simple planet models using foam balls or papier-mâché. Children paint each planet based on their research about surface features and colours.
Try crater experiments with flour, cocoa powder and marbles of different sizes. Kids drop marbles from different heights to see how impact force changes crater size. This shows meteorite impacts in a way that links to real lunar features.
Build plastic bottle rockets using vinegar and bicarbonate of soda. The class tests how different fuel amounts change launch height and records results in tables. Solar system facts help pupils understand what they’re modelling.
Moon phase activities work well with torches and balls. One student holds the torch as the “sun” and another moves a ball around to show how light creates the phases we see from Earth.
Set up ramps at different angles using wooden planks or cardboard. Students roll toy cars and measure distances to learn about gravity and friction. Change the surface by using sandpaper, fabric or bubble wrap.
Balloon rockets along string lines show thrust and air resistance. Children thread string through a straw, tape on a balloon and watch the straw shoot along as air escapes. Test if balloon size or string angle changes the speed.
Paper helicopter experiments let students explore air resistance. They cut templates, drop them from set heights and time the descent. Change wing size or add paperclips and see how weight affects falling speed.
Bridge building with lollipop sticks or newspaper teaches load-bearing and structural strength. Teams try to build a bridge that holds the most weight before collapsing. This brings real engineering ideas into the classroom in a fun way.
Create pendulum investigations with string and washers. Students change string length or weight to see what affects swing time. They record results in charts and look for patterns about energy transfer.
Marble runs made from cardboard tubes and boxes let children experiment with momentum and gravity. Challenge them to design the longest route or add features like loops or jumps.
STEM challenges build critical thinking by getting students to test ideas, learn from mistakes and work together. These activities connect science, technology, engineering and maths in ways that feel real.
Engineering challenges give students hands-on experience with design and testing. The egg drop challenge asks children to protect a raw egg from breaking when dropped using cardboard, bubble wrap or recycled materials. Kids quickly learn that mistakes lead to better designs.
Building challenges suit mixed ability groups. Year 3 and 4 students can make paper aeroplanes and time flights. Older pupils might build towers with jellybeans and toothpicks, exploring stability and weight.
A hand crank winch uses cardboard rolls and string. Students see how pulleys give mechanical advantage when lifting objects. These activities fit Key Stage 2 technology aims and help children learn resilience when things don’t work out first time.
Team challenges teach collaboration and scientific ideas. The sneeze zone investigation uses spray bottles to show how germs spread, sparking talks about health and data recording. Groups measure distances, record results and share findings.
An oil spill cleanup simulation sets up environmental problems needing creative fixes. You provide water, cooking oil, feathers and cleaning materials. Teams remove oil while wasting as little water as possible, similar to real engineering challenges.
Nature walks plus observation tasks encourage inquiry. Classes collect evidence with magnifying glasses, keep nature journals and write poems about what they find. These STEM activities link outdoor learning with literacy across the curriculum.
Technology brings new twists to classic STEM challenges. Coding activities with LEGO introduce sequencing by having children arrange command cards to guide figures through mazes. This suits Year 2 and up, building computational thinking without screens.
Stop-motion animation projects mix creativity with tech skills. Students use tablets to capture frames of moving objects, learning about timing and storytelling. LearningMole shares free curriculum-aligned videos on coding and digital literacy for Key Stage 1 and 2.
Digital tools help collect data in experiments. Pupils can take photos, create graphs on tablets or record video observations. These methods support Key Stage 2 computing aims and make science more engaging for visual learners.
Science Week works best when you include everyone, present ideas in creative ways and celebrate what young scientists achieve. These three things help turn ordinary lessons into memories students keep for years.
Plan activities that fit different learning styles and abilities right from the start. Some students learn by watching, others by touching and building. Set up experiment stations with different levels so Year 1 and Year 6 can work on similar ideas at their own pace.
Pair students so confident learners help those who need it. If a child struggles with writing, let them draw diagrams or take photos instead. Students with physical disabilities can time experiments, record data or explain what they notice.
Pick experiments with flexible roles. One child measures, another stirs, a third records what happens. Rotate jobs so everyone gets a go. Science Week is a chance to engage students with hands-on experiments that suit all needs.
Children remember experiments more when they present results in fun ways. Skip the standard report and let them make comic strips showing their volcano or design posters with drawings and labels. Year 3 and 4 pupils love making short videos as news reporters explaining discoveries.
Dramatic presentations work for younger children. They can dress up as scientists, perform skits about the water cycle or sing songs about plant growth. These options help children who find writing tough but have strong speaking or art skills.
Display work around school so everyone sees what happened. Set up a science gallery in the hall with photos, charts and models. Invite parents to an exhibition where children show favourite experiments and explain what they learned.
Recognise every student’s effort on the last day of Science Week. Create certificates for things like ‘Best Hypothesis’ or ‘Most Creative Experiment Design’ instead of only rewarding top performers. This values all strengths and keeps everyone motivated.
Take photos during the week and share them with families in newsletters or on your website. Show the messiest moments, surprises and even mistakes, not just the perfect results. Real science involves trial and error, and children need to see that’s normal.
Organise a whole school assembly where each class shares one highlight from Science Week. Keep it short but let every year group join in. This builds confidence and gives younger pupils ideas for next year.
Primary teachers often want quick answers about planning science activities, from free experiments to projects that build teamwork across year groups.
You can find great printable activities in the British Science Week primary pack. The pack offers worksheets and challenges that fit the UK curriculum.
Many activities use observation sheets for recording changes in materials or tracking weather. You might also print investigation recording sheets that guide pupils through the scientific method.
Poster-making works well for Year 3 and above. Children research a scientist or invention and present findings visually. Colouring sheets with science diagrams help younger pupils in Key Stage 1 learn about body parts, plants or simple machines while building fine motor skills.
Growing cress seeds in different conditions is a great free experiment for Key Stage 1. You just need cress seeds, cotton wool and a few places in your classroom to test light, water and warmth.
Making volcanoes with bicarbonate of soda and vinegar is cheap and shows chemical reactions clearly for Year 4 and Year 5. The fizzing grabs attention and starts conversations about gases and mixtures.
Static electricity experiments with balloons and bits of paper show invisible forces. You can also explore density by making rainbow layers in a glass with sugar water solutions of different strengths, which works well for upper Key Stage 2.
Ice melting investigations let children test which materials insulate best by wrapping ice cubes in different fabrics. LearningMole has free science videos with clear instructions for many of these experiments.
The Primary Science Teaching Trust offers Whistlestop Science Weeks. These are themed activities organised by day, with short challenges for home or school. They work well for busy teachers.
British Science Week has assembly scripts and follow-up activities for Key Stage 1 and 2. The scripts introduce science themes to the whole school, and classroom activities keep learning going all week.
You can browse Science Week ideas on educational resource sites, sorted by year group and topic. Many sites let you filter by curriculum aims, making it easier to plan activities that keep pupils interested.
Year 5 and Year 6 pupils can build bridges from paper and tape. They test which designs hold the most weight and learn basic engineering ideas. This activity brings together maths and problem-solving, and kids get to try out different designs.
Year 4 pupils can make simple electrical circuits using batteries, bulbs and wires. They might design quiz boards or burglar alarms that light up with the right answer. Suddenly, electricity doesn’t feel so abstract.
Paper aeroplane projects suit Key Stage 2 pupils. They experiment with forces and motion. Try measuring flight distances or change the shape of the wings, then record the results with graphs.
Reception and Year 1 pupils love construction challenges, like building the tallest tower from marshmallows and spaghetti. Year 6 children can create water filters from sand, gravel and coffee filters to clean dirty water. They learn about environmental science in a hands-on way.
Kick off the term with a whole-school science assembly. Introduce a weekly science challenge and display it on a corridor board. Each class adds their observations or predictions during the week, which really gets everyone involved.
Put a nature table near your classroom door. Kids can bring in cool things they find at home or outside. Use these items for quick chats in the morning, tying into seasonal changes or life cycles from the science curriculum.
Set up science stations for the first week. Small groups rotate through quick experiments like magnetic fishing, colour mixing or floating and sinking. This helps you spot what kids already know and sets the tone for practical work.
Pick an afternoon each week for “Wonder Wednesday” or “Friday Science Fun”. Explore questions children have asked. This regular slot weaves science into your timetable without making planning a headache.
Try the egg drop challenge. Groups of four or five design packaging to keep an egg safe when dropped from a height. Kids share ideas, pick roles and test their creations together. This builds communication skills and gets everyone thinking like a scientist.
Set up a class weather station. Different groups keep track of temperature, rainfall, wind direction or cloud cover. They each present their findings during weekly science circle time. This gives everyone a chance to practise collecting data and speaking in front of others.
Let pupils build marble runs from recycled bits and bobs. Teams test and tweak their designs, working out problems as they go. Year 3 and Year 4 usually love this one, especially when they see if their ideas actually work.
Try mystery powder investigations with Year 5 and Year 6. Give each group a set of white powders, like salt, sugar, flour and bicarbonate of soda. They work together to test and figure out which powder is which. Groups agree on how to test, write down what they see and decide together what each powder must be.
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