10 Simple Science Projects for 5YearOld Kids
Written by Smriti Dey | April 29, 2026
Introduction
The difference between real early science and regular play is that there is a simple, observable question: what happens when? When a five-year-old drops things into water to see which ones float, they aren't just playing; they're testing a hypothesis, watching what happens, and drawing conclusions in a way that is very similar to the basic structure of the scientific method. This habit of asking questions, which started at age five, gets stronger with each year of science education.
Science projects for 5-year-olds work best when they use safe, familiar household items and show results right away that kids can talk about and describe without needing help from an adult. The National Council of Educational Research and Training says that kids who do hands-on science activities in preschool have better scientific reasoning, better observational skills, and more academic curiosity that lasts through their primary school years.
10 Science Projects For 5-Year-Olds
1. Color Mixing With Water
Kids can learn about color theory by seeing it in action when they mix primary-colored water in clear glasses. It's one of the best science projects for 5-year-olds that doesn't need any special supplies. Kids guess what colors will come out before they mix them, watch what happens, and learn that red and blue make purple by doing it themselves instead of being told.
Materials Required: Clear glasses, water, red, blue, yellow food colouring, a spoon
Steps:
Fill three glasses with the same amount of water, then add one food color to each.
Before you pour the two glasses together, ask the child to guess what color they will be.
Carefully mix different pairs of colors and write down what you think will happen and what actually happens.
When you mix different wavelengths of light, you get new colors.
2. Sink Or Float Test
A great way to teach kids the kind of classification thinking that science projects for 5-year-olds should teach is to gather things from around the house and see if they sink or float. This helps them learn to notice a property, make a guess, test it in a systematic way, and change their understanding based on what they find.
Materials Required: Large bowl of water, collection of household objects including coins, corks, spoons, sponges, plastic toys, fruit pieces
Steps:
So you can test the things you've gathered in an organized way, put them next to a big bowl of water.
Before you start testing, ask the child to group items based on what they think will "sink" and "float."
After you've tested each object, put it in a group with a confirmed result.
Use the word "density" in a simple way to talk about the things that float and the things that sink.
3. Baking Soda And Vinegar Reaction
This chemical reaction demonstration is one of the best science projects for 5-year-olds because it shows how vinegar makes baking soda fizz. The results are quick and very clear, and kids want to do it over and over again in the same session.
Materials Required: Baking soda, white vinegar, small containers, food colouring (optional), spoon
Steps:
Put a little baking soda in each container and ask the child what they think will happen when you add vinegar.
You can add food coloring to the vinegar before the demonstration if you want to make it look better.
Slowly pour small amounts of vinegar over the baking soda and watch it fizz right away.
Explain that the fizzing is a gas that happens when two different things mix together and react with each other.
4. Growing Cress From Seeds
Growing fast-germinating cress seeds on wet cotton wool is a great science project for 5-year-olds. They can see the whole life cycle of a plant in just a few days. This project teaches biology and how important it is to take care of things every day.
Materials Required: Cress seeds, cotton wool, shallow tray, water and sunlight access
Steps:
Place some wet cotton wool in a shallow tray and evenly spread cress seeds on top of it.
Put the tray in a sunny window and ask the child to guess how many days it will take for the seeds to grow.
Every morning, give the cotton wool a little water and watch it. In a simple illustrated journal, write down any changes you notice.
After the cress has grown, cut it with scissors to use in sandwiches. This connects science to food.
5. Ice Melting Experiment
One of the easiest but most fun science projects for 5-year-olds that only uses water, a freezer, and things around the house is to see how the speed at which ice melts changes when kids change the conditions.
Materials Required: Ice cubes, small plates, salt, black cloth, sunlight access, timer
Steps:
Put the same ice cubes on different plates and put each one in a different place, like in the sun, in the shade, on black cloth, or with salt on top.
Before you start the timer, ask the child to guess which ice cube will melt the fastest.
Look at all the plates every five minutes and write down which ice cube gets smaller the fastest each time you look at them.
Use simple examples of how heat moves to explain why ice melts at different rates in different situations.
6. Shadow Tracing
Tracing shadows at different times of the day is one of the best outdoor science projects for 5-year-olds that connects what they see every day to planetary science. This teaches kids how the Earth moves in relation to the sun.
Materials Required: Chalk, an outdoor flat surface, a stationary object, sunshine
Steps:
In the morning, choose an outdoor object that doesn't move, like a flowerpot or a garden tool, and use chalk to draw its shadow.
At noon, go back to the same place and trace the shadow again, but this time use a different color of chalk.
Do the tracing again in the late afternoon and put all three shadow outlines next to each other.
Use simple words to explain how the Earth moves and why the shadow changes length and moves during the day.
7. Magnetic Attraction Discovery
One of the most fun science projects for 5-year-olds is to find out which things in the house respond to magnetic force. Kids are amazed when they first feel the invisible push and pull of magnetic force.
Materials Required: One bar magnet, a collection of household objects including coins, paper, fabric, metal clips, plastic pieces and wooden blocks
Steps:
Put some things from the house in a line and ask the child to guess which ones the magnet will pull before you try it.
Move the magnet slowly toward each object and pay close attention to how it reacts before you write down what you see.
When you're done testing each item, put them into two groups: "magnetic" and "not magnetic."
Say that "metal" is the group that most magnetic things belong to, but that there are some exceptions, like aluminum.
8. Paper Bridge Engineering
Five-year-olds are asked to think about structural engineering by trying to make the strongest bridge they can out of one sheet of paper. This is one of the most open-ended science projects for 5-year-olds, and every child who does it finds a different way to do it.
Materials Required: Single sheets of A4 paper per attempt, small coins or blocks as weights, two equal stacks of books as bridge supports
Steps:
To hold up the bridge, place two stacks of books that are the same height a little bit apart. Then give the child one piece of paper.
Tell the kid to fold the paper in any way they want to make a bridge that goes between the stacks of books.
Put one coin on the bridge at a time until it falls down from the weight. This will show how strong the bridge is.
Try putting the paper together in different ways each time and talk about how the changes in structure changed how well the bridge could hold weight.
9. Celery Color Absorption
Putting white celery stalks in colored water and watching how the color moves up through the plant is one of the most visually interesting science projects for 5-year-olds that connects directly to plant biology concepts they learn in primary science.
Materials Required: White celery stalks with leaves, food colouring, clear glasses, water, 24 hours observation time
Steps:
Put water in clear glasses and add food coloring to each one in different amounts.
Place one stalk of celery in each glass and ask the child to guess what will happen to the white celery over the next day.
Every few hours, check on the stalks and write down how the color changes slowly as it goes up through the celery structure.
After 24 hours, cut the celery across the stalk and look inside to see the colored water channels.
10. Balloon Static Electricity
One of the best science projects for 5-year-olds is to use a balloon to make static electricity and then use that electricity to attract small pieces of paper. All your kids need are a balloon and some small bits of paper.
Materials Required: Inflated balloon, child's hair, small torn paper pieces, wall surface
Steps:
To build up static charge, rub the inflated balloon firmly against the child's hair for ten to fifteen seconds.
Put the balloon on a flat surface next to some small pieces of paper and watch them jump toward it.
Let go of the balloon after you put it against a wall. See how it stays on the wall for a little while.
Say that rubbing moves tiny electrical particles to explain why the wall and paper pieces are drawn to the balloon.
Conclusion
Science projects for 5-year-olds give children their earliest experience of the inquiry process that all scientific thinking builds upon. Parents who facilitate these simple, hands-on activities during the preschool years develop children whose natural curiosity transforms into genuine scientific reasoning — the most academically valuable intellectual habit any child can form before formal schooling begins.
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