sensory-play
Frozen Dinosaur Ice Rescue
Dinos trapped in an ice block, freed with warm water, salt and a pipette.
40 minIndoor or outdoorSome mess
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Science Experiments for Kids
Every experiment here explains the actual mechanism in language you can repeat to a five-year-old without being wrong. Vague answers get remembered just as firmly as accurate ones.
We favour experiments that can be repeated immediately. Watching something happen once is a demonstration; doing it eleven times is science.
Browse by age
Number of activities suitable for each age. Many activities suit several ages, so these overlap.
Featured science experiments activities
learning
Coffee Filter Butterflies
Marker colour blooms across wet paper — chromatography that ends as wall art.
25 minIndoorLow mess
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learning
Walking Water Rainbow
Water climbs kitchen paper between cups and mixes new colours on its own.
25 minIndoorNo mess
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learning
Fizzing Baking Soda Eruptions
A tray of coloured bicarb and a pipette of vinegar. Endlessly repeatable fizz.
30 minIndoor or outdoorSome mess
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outdoor
Shadow Drawing
Line toys up in the sun and draw round their shadows. Sunny-day magic.
30 minOutdoorNo mess
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learning
Sink or Float Kitchen Lab
Test ten safe household objects in a bowl of water, make predictions and record which ones sink or float.
25 minIndoorLow mess
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outdoor
Build a Bug Hotel
Use hollow stems, pinecones and a sturdy container to build a sheltered garden space for visiting insects.
60 minOutdoorLow mess
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learning
Cardboard Marble Run Challenge
Tubes, tape and a wall — an engineering problem with an instant pass or fail.
60 minIndoorNo mess
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outdoor
Bubble Snake Blower
A cut bottle, an old sock and washing-up liquid make metres of foam snake.
25 minOutdoorLow mess
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sensory-play
Slime Making
Glue, activator and a few minutes of kneading make a stretchy slime that turns into its own sensory play session.
30 minIndoorSome mess
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science
Kids Science Colour Lab
Mixing primary-coloured water, pipettes and household fizz to test what happens when colours and reactions combine.
35 minIndoorSome mess
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sensory-play
DIY Sensory Bottle
A sealed bottle of water, glitter and small floating beads becomes a calming shake-and-watch toy.
25 minIndoorLow mess
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painting
Salt Painting
Glue-and-salt lines turn watercolour into a raised, crystalline effect that spreads on contact.
40 minIndoorSome mess
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science
Baking Soda Balloon Experiment
Vinegar and baking soda fizz inside a bottle and inflate a balloon on top without anyone blowing into it.
15 minIndoorLow mess
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science
Magic Milk Colour Experiment
A drop of dish soap sends food colouring swirling across a plate of milk in patterns that never repeat.
15 minIndoorLow mess
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science
Homemade Colour Mixing Lab
Coloured water in jars and a set of pipettes turn a kitchen table into a hands-on colour-mixing lab.
35 minIndoorLow mess
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stem
Cup-and-String Telephone
Two paper cups and a length of string turn into a working telephone that teaches how sound actually travels.
20 minIndoor or outdoorNo mess
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stem
Magnet Discovery Hunt
A room-by-room hunt with a fridge magnet turns 'what will stick' into a proper hands-on science lesson.
25 minIndoorNo mess
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Twenty printable activity cards for ages 2–8, sorted by time and mess level. One email, no spam, unsubscribe any time.
Frequently asked questions
What's the best first science experiment?+
Sink or float. It needs one bowl, teaches prediction and testing, and has genuinely surprising results.
How do I answer science questions I don't know?+
Say you do not know and look it up together. Modelling that is more valuable than having the answer.