How to Create Puffy Slime With Your Kids

With just a few simple household ingredients, it’s easy to create a batch of puffy, slimy fun at home.
Jun 13, 2018

Ages

7-13

How to Create Puffy Slime With Your Kids

Jun 13, 2018

Kids love slime. Why is slime so much fun to play with? The answer may be a mystery, but with this simple recipe, you can make a batch at home with your child.

You'll need just a few household items to get started  —  see below for the supply list and steps to follow. 

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You’ll Need

  • Glue (Elmer’s clear glue or school glue)
  • Baking soda
  • Contact lens solution containing boric acid  
  • Shaving cream
  • Food coloring
  • Large bowl
  • Plastic bag
How to Make Puffy Slime
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Step 1: Have your child add about 4 oz glue to a large bowl. (Most bottles of glue contain approximately 4 oz.)
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Step 2: Let your child measure ½ tsp baking soda and add it to the glue in the bowl. Stir until dissolved.
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Step 3: Add ¼ cup shaving cream to the bowl and mix it into the glue and baking soda mixture.
 
Step 4: Have your child stir a drop of food coloring into the mixture.
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Step 5: To turn the mixture into slime, add a few squirts of contact lens solution (around 1 tbsp) and stir.
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Step 6: Touch the slime. If it’s still sticky, add another squirt of contact lens solution. Repeat until the slime isn’t so sticky anymore, and you can actually play with it.
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Step 7: Store the slime in a plastic bag.

The Science Behind the Fun
Glue is made up of long chemical chains called polymers. When a cross-linking chemical is added, these chains stick together, creating slime.

In this experiment, the contact lens solution's boric acid and baking soda combine to make a cross-linker for the glue. And air bubbles in the shaving cream get trapped in the mixture, making the slime foamy.  

Enrichment Activities

  • Let your child try her hand at color-mixing.
  • Ask your child how he would make a double recipe or a half-recipe of slime.
  • Encourage your child to think of other safe ingredients she could add to her slime to change the texture, like corn starch or lotion. (Hint: For the best results, always add the contact lens solution last after everything else has been mixed together.)
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