How to Make - Amazing Rainbow Slime

Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

We love slime. It’s one of our favorite things to make. Slime is fun because it is always impressive to see molecules bonding together in a new way right before your eyes. Plus, who doesn’t love playing with magic, stretchy slime?

We’ve found that the best slime recipe doesn’t use Borax powder (although we’ve made some cool slimes with Borax!), but rather with laundry starch (laundry starch does contain Borate though, so don’t use this recipe if you are sensitive to Borate chemicals). You can buy a huge container of starch that will last you a LONG time.

The only way to make slime more fun is to bring in more color. A LOT more color. And so, rainbow slime is born.

Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

More Slime Recipes to Try!

Spectacularly Happy and Fun Rainbow Slime
Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

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This Borax-free slime is fun for all ages (except for babies who might eat it).

What you’ll need to make rainbow slime:
Elmer's Liquid School Glue, Premium Clear, Washable, 1 Gallon, 1 Count - Great For Making Slime
Elmer’s Liquid School Glue, Premium Clear, Washable, 1 Gallon, 1 Count – Great For Making Slime
Food Coloring Liqua-Gel - 6 Color Rainbow Kit in .75 fl. oz. (20ml) Bottles
Food Coloring Liqua-Gel – 6 Color Rainbow Kit in .75 fl. oz. (20ml) Bottles
Purex Sta-Flo Liquid Starch, 64 Ounce
Purex Sta-Flo Liquid Starch, 64 Ounce
Original Stationery Arts and Crafts Glitter Shake Jars, Extra Fine, 24 Multi color Set
Original Stationery Arts and Crafts Glitter Shake Jars, Extra Fine, 24 Multi color Set

Good food coloring (I swear by this brand, the colors are so rich!)
6 bottles of school glue
Liquid laundry starch
6 mason jars
Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

First add 1/2 a cup of water to each mason jar. Put a squirt of color into each jar (red, orange, yellow, green, blue, and purple). Mix.

Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

Add one bottle of glue to each jar and stir until combined. Or, if you buy a gallon of school glue (which you’ll want if you make slime a lot, so much cheaper!), put 1/2 a cup of glue in each jar.

Pour 1/2 a cup of laundry starch into each jar.

Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

Stir with a fork until the mixture starts to form stretchy, polymer bonds. It will sound like a dog lapping when it’s about ready.

Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!Wait 10 minutes for the glue and starch to fully bond. This will prevent your hands from getting as sticky.

Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

Place one clump of each color in the order of the rainbow: Red, orange, yellow, green, blue, and purple!

Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

Stretch and play with this amazing slime! Just watch out, if you mix all the colors together it becomes an ugly brown.

Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

The Science of Slime
Nothing says happy like a pretty rainbow. And this amazing rainbow slime will be a HUGE hit in your science classroom, or just at home!

If you want to make this into a full STEAM activity, try mixing glue with other ingredients to see if you can make slime in other ways. You can also try mixing colors of slime together. What new colors can you make?