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Giving children varied opportunities to learn is so important. With the twiglets I often end up just doing crafty-type activities with them at home, and not much else. (Well apart from the obvious screen time, reading, free play etc!) But I also really want to inspire a love of science in them too. After all, it does explain basically everything that’s going on around us! And you know with us it’s allll about the rainbows! So I’ve pulled together some of the best and most exciting rainbow science experiments for kids.

Erupting rainbow science experiment

Erupting rainbow science experiments for kids

Can you make a rainbow volcano?

Love this erupting rainbow science experiment from Little Bins For Little Hands.

Rainbow walking water experiment

Rainbow walking water science experiment

Can you create a rainbow with food colouring and water?

This rainbow walking water experiment from Fun Learning For Kids is so awesome! Word of warning though – I tried this with my Reception class and could not get it to work! So my advice would be make sure you have the right type of kitchen towel!!

Growing rainbow crystals experiment

Growing rainbow crystals

Can you make a rainbow out of crystals?

Growing your own rainbow crystals looks like such a fun activity for kids! From Little Bins For Little Hands.

Rainbow Skittles experiment

Rainbow Skittles experiment

Can you make a rainbow by adding warm water to Skittles?

Why not give the famous rainbow Skittles experiment a try? You can find the method in lots of places – this version is from Mas And Pas 🙂

Rainbow ice and salt experiment

Rainbow ice and salt experiments for kids

What happens when salt and food colouring are added to ice?

This rainbow ice and salt experiment from Powerful Mothering looks fab, especially for younger children and preschoolers.

Rainbow water xylophone

rainbow water xylophone

What happens when you hit bottles with different amounts of water in?

I love this rainbow water xylophone experiment from Mama Papa Bubba.

Climbing rainbow science experiment

climbing rainbow science experiments

What happens when you put rainbow marker pen on kitchen towel then put it in water?

How beautiful does this climbing rainbow idea from Coffee Cups And Crayons look?

Rainbow baking soda experiment

Rainbow baking soda science experiments

What happens when you add vinegar to baking soda?

This rainbow baking soda experiment from Messy Little Monster looks like loads of fun 🙂

Fizzing scented rainbow science experiment

scented rainbow science experiments

This fizzing scented rainbow science experiment from Fun A Day looks amazing! Same concept as the previous baking soda experiment but with more of a sensory focus 🙂

More rainbow sensory activities here 🙂

Rainbow in a jar experiment

Rainbow in a jar

What happens to the density of water when you add sugar?

Kids would love this rainbow in a jar experiment from Primary Playground.

Have you tried any of these rainbow science experiments before?

And if you fancy making things a bit easier for yourself, there are some fab kits out there to guide you and provide what you need for creating some rainbow science!

* affiliate links

Thanks for reading! Til next time,

Hannah xx

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Rainbow science experiments Pinterest

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9 Comments

  1. Rainbows are just the best! We’ve tried a few of these experiments and the boys loved them. 🙂 x

  2. These are all fab ideas! We’ve tried the climbing rainbow one, and my three are constantly asking to try the Skittles one! Truthfully, I can’t bare to buy something so tasty and not eat it though! Haha

    • hannahandthetwiglets@outlook.com Reply

      Haha Skittles are very yummy, I wasn’t allowed to eat them as a kid because all the colourings were so bad for my eczema haha!

  3. Shelley Whittaker Reply

    My daughter would love all of these! I particularly like the rainbow crystals 🙂 #KCACOLS

  4. thisiswhereitisat Reply

    My boys have done the rainbow skittle experiment and blew their kinds lol x #kcacols

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