How to Make Rainbow Slime

Published 1 day ago• 3 minute read

Get ready to mix, stretch, and swirl your way into a world of colour! This rainbow slime recipe is bright, beautiful, and super fun to make. Whether you’re crafting with kids on a rainy afternoon or setting up a playful science activity, this vibrant DIY slime is sure to be a hit.

With its soft texture and stunning rainbow layers, this project is a great way to explore colour mixing, sensory play, and hands-on creativity. It’s easy to follow, visually exciting, and perfect for anyone who loves a splash of colour in their crafts. So let’s dive in and make some rainbow magic, one layer at a time!

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Make bright and beautiful rainbow slime with this easy DIY recipe! Perfect for spring, St. Patrick’s Day, or a colourful craft day, this stretchy slime is fun for kids to create, play with, and explore.

Step 1: Find what you need

Step 2: Mix the first ingredients

Step 3: Activate the slime

Step 4: Repeat and combine the rainbow slime colours

You can also have fun making actual rainbows with the slime!
Then have fun seeing how the rainbow colours mix as you play with the slime.
Your rainbow slime is complete!

You can use acrylic paint, food colouring, or liquid watercolours to colour your slime. Liquid watercolour paint will give you the most vibrant colours, but all three options work well!

Your slime should stay good for about a week or a little longer if stored in an airtight container. To keep the rainbow look, store each colour separately.

For longer lasting slime, always wash your hands first and play on a clean surface. And if the slime smells off or looks odd, it’s best to toss it and make a new batch.

Rainbow slime looks amazing when you first bring the colours together, but eventually they’ll blend into a purple shade as you play with it. That’s just part of the fun!

To get the most out of the rainbow effect, divide each colour into 10 small sections. This gives you more time to play and explore before they mix. And if you save your slime for a few days, the colours tend to blend more slowly!

Rainbow slime isn’t just bright and beautiful — it’s a fun, hands-on way to explore colour, creativity, and sensory play. Whether you’re making it for springtime fun, a St. Patrick’s Day activity, or simply because your day could use a splash of colour, this slime is sure to bring smiles all around.

Every swirl and stretch is a chance to experiment and play, making it a craft you’ll want to come back to again and again. So break out your slime making supplies, roll up your sleeves, and enjoy the magic of rainbows whenever inspiration strikes!