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Home » Early Years Science » Science Experiments for Preschoolers

Science Experiments for Preschoolers

Modified: Mar 27, 2025 · Published: Feb 25, 2020 by Emma Vanstone · This post may contain affiliate links · 7 Comments

This collection of science experiments for preschoolers contains many of my all time favourite science activities. When I started this website, I had three preschool age children, and we all have happy memories of baking soda and vinegar potions, endless volcanoes, sinking and floating in the garden, bug hunts and lots of other fun preschool science activities.

Over the years, I have found that even very young children can enjoy science at home. Most science activities are very hands-on and can easily be turned into a learning through play experience, which makes them perfect for preschoolers!

It’s never too early to introduce children to science; just make sure everything is age-appropriate and safe for them.

Easy Science Experiments for Preschoolers

Messy Science Station

My little girl was mesmerised by our messy science station and spent a good hour mixing and experimenting with different combinations of the ingredients.

The station included oil, water, food colouring, baking soda and vinegar.

Fun science for kindergarten, set up a messy science exploration station. Great preschool science experiment. #preschoolsicnce

Fizzy rocks

Fizzy rocks take a bit of preparation but are totally worth it for the giggles when they start to fizz and melt. You can even hide little bugs or toy figures inside. I once hid these in different places for the kids to find and drew them a treasure map!

small toy bugs inside baking soda and water rocks

Ice Cream Soup

Explore melting with some ice cream soup. Don’t forget to eat it afterwards! This is a brilliant way to introduce kids to changes of state and the effect of temperature on frozen things.

Giant Bubbles

Learn how to make giant bubbles. This is a fantastic preschool activity, as children can look for rainbows in bubbles and create their own magic bubble solution.

Another fun bubble science idea is to set up a bubble-making station with pipe cleaners and straws so that children can make their own bubble wands.

different shaped bubble wands for a bubble making science challenge

Erupting Volcano Science Experiments for Preschoolers

Make an erupting volcano with snow, sand or even papier mache. One of the best things about baking soda volcanos is that they can be erupted over and over again!

multicoloured volcano science activity

Colourful Shadow Puppets

These colourful shadow puppets are very easy to make and look amazing! Children can watch as the shadows change in size as they are moved closer to the ground.

shadow puppets made using black paper and coloured cellophane

Fruity Boats

Fruity boats are a great creative science activity and a lovely twist on a traditional sink/float experiment. Children can make little sails, blow the boats with straws and even add toy figures to make the boats sink.

Small bots made from melon and lemon and lime skin for a sink or float science challenge for preschoolers

Boats made from recycled materials are also great to test in the same way.

Make Slime or Oobleck

Slime and oobleck are both lovely sensory materials. All our slimes are borax free and feel amazing!

Oobleck is fascinating to kids and adults. Squish it in your hand, and it feels solid. Release the pressure, and the solid ball starts to flow! AMAZING! For preschoolers, I usually add a sieve and some plastic toys to a tray of oobleck and let them explore. Oobleck is also great frozen. I freeze it into shapes using ice cube moulds and let it defrost before the children play.

Ice Science Experiments for Preschoolers

Painting on ice is a lovely creative science activity for younger children. This is great fun on a sunny day as the ice feels lovely to paint on as it starts to melt.

Ice excavations are always a big hit in our house, too. I usually put them out with little pots of warm and cold water and pipettes so the kids can drop water over the ice to melt it.

LEGO Ice excavation

Sensory bottles

We have a simple magnet sensory bottle, that is great fun and love this i-spy bottle from The Imagination Tree.

No Time for Flash Cards has some gorgeous colour mixing sensory bottles you might like!

Magnet Science Experiments for Preschoolers

My paper plate magnet maze is one of our favourite preschool science activities. It can be themed in many different ways, making it perfect for any topic or time of year.

magnet maze

We also LOVE this magnet hair activity from Laughing Kids Learn.

Fairy Tale Science Experiments

This collection of Fairy Tale science experiments is one of our favourites. Grow a bean for Jack, make a zip wire for Rapunzel and lots more fun preschool science experiments.

Dr Seuss Science Activities

This collection of Dr Seuss science activities is perfect for preschoolers!

Science Kit for Preschoolers

You don’t actually need much specialised equipment for preschool science experiments and investigations, but if you did want to invest in a few items these are the ones we would recommend and have all been used in our house for years!

Magnet Wands – these can be used for magnet mazes, general testing to see if things are magnetic and magnet sensory bottles.

Pipettes – pipettes are great for ice excavations!

Tweezers – we use these for fine motor control activities, sorting and lots more.

My little boy also loves his tape measure!

Easy and hands on preschool science experiments. Magnet experiments, sensory bottles, bubbles, messy science and fairy tale science experiments for preschoolers #preschoolscience #scienceforpreschoolers

All these activities use non-toxic materials, but please supervise small children at all times. They wouldn’t be very nice to eat or drink.

If you’re looking for ideas for even younger children, try this collection of non messy toddler science experiments.

This post contains affiliate links

This post was updated Feb 2020

Last Updated on March 27, 2025 by Emma Vanstone

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Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

Reader Interactions

Comments

  1. Louise Edwards

    August 17, 2014 at 8:07 am

    lovely ideas, your blog rocks! xx

    Reply
    • Emma Vanstone

      August 18, 2014 at 7:02 am

      Thank you 🙂

      Reply
  2. Emma

    August 25, 2014 at 5:58 pm

    Oh my gosh, that top photo is just the sweetest! 😀 I bet she had a ball conducting lots of experiments with you! Love the look of the colourful milk! 🙂 xx

    Reply
  3. Michelle Twin Mum

    August 25, 2014 at 6:25 pm

    Looks liek she was realy enjoying herself. This is the thing with a number of kids, you forgot what you did with who! lol Mich x

    Reply
  4. Aly

    August 25, 2014 at 8:14 pm

    My 6 year old would love doing this.Where would I buy a pipette from?

    Reply
  5. Emma

    August 25, 2014 at 9:21 pm

    Milk pictures – why hadn’t my science teacher husband shown us that one! A new one for Erin to try.

    Reply
  6. Donna@MummyCentral

    August 26, 2014 at 3:24 pm

    I am SO bookmarking this to do with the boys on a rainy day.

    Reply

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