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So right out of the gate, I’m here to tell you that when making slime at home, experimentation is the best way to go. My daughter, Vivian (7) LIVES for making slime. We had to set some parameters when this craze started in our house, just for my own sanity. 😉 

I’ll share the ingredients with you with the suggestion to give your littles the list but encourage them to explore and see what happens.

At Shattered Glass STEM-tacular we used Borax in place of contact lens solution which, as I’m told by my 7 year old, that is called “Fish Ball Slime” and provides an entirely different experience. Vivian prefers fluffy slime (via contact lens solution) but had a great time experimenting with the differences and testing different combinations to see which she liked best.


2/3 cup of Elmer’s White Glue – we like to buy this gallon size of white glue as it’s a lot cheaper and you can continue to use it to make more batches.

Note: we made this with Elmer’s white glue. Do not substitute with other glue as the make-up may not be the same and the recipe may not work

– 1/2 teaspoon Baking Soda

– 1/4 Cup Water

– 2-3 cups Shaving Cream – hint: Do not use the gel! Old fashioned foaming cream works best.

– 1.5 Tablespoons Contact Lens Solution –  *Important: your brand of contact lens solution must have boric acid and sodium borate in the ingredient list. This is what interacts with the glue to form the slime. We recommend only using Renu fresh or Equate brand. Do not substitute with other brands.

Thanks to Best Ideas for Kids for their original recipe posted at the link. Additionally, their recipe contains affiliate links and you can click their link above for their disclosure policy and additional information.


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Our holiday STEM-tacular activities were inspired by the SCIENCE portion of STEM. One of the most popular experiments was our chemistry focused Polymer Bouncy Balls, orignally shared by Anne Marie Helmenstein, Ph.D. on ThoughtCo. (Original link can be found HERE.) 


  • Borax (found in the laundry section of the store)
  • Cornstarch (found in the baking section of the store)
  • White glue (e.g., Elmer’s glue, which makes an opaque ball) or blue or clear school glue (which makes a translucent ball)
  • Warm water
  • Food coloring (optional)
  • Measuring spoons
  • Spoon or craft stick (to stir the mixture)
  • 2 small plastic cups or other containers (for mixing)
  • Marking pen
  • Metric ruler
  • Zip-lock plastic baggie

To make bouncing polymer balls, follow these steps:

  1. Label one cup “Borax Solution” and the other “Ball Mixture.”
  2. Pour 2 tablespoons of warm water and 1/2 teaspoon of borax powder into the cup labeled “Borax Solution.” Stir the mixture to dissolve the borax. Add food coloring if desired.
  3. Pour 1 tablespoon of glue into the cup labeled “Ball Mixture.” Add 1/2 teaspoon of the borax solution you just made and 1 tablespoon of cornstarch. Do not stir. Allow the ingredients to interact on their own for 10-15 seconds and then stir them together to fully mix. Once the mixture becomes impossible to stir, take it out of the cup and start molding the ball with your hands.
  4. The ball will start out sticky and messy but will solidify as you knead it.
  5. Once the ball is less sticky, go ahead and bounce it.
  6. You can store your plastic ball in a sealed bag when you are finished playing with it.
  7. Don’t eat the materials used to make the ball or the ball itself. Wash your work area, utensils, and hands after you have completed this activity.

Looking for Fluffy Slime? Click HERE!.