You will need:
- 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 – makes an opaque ball) or blue or clear school glue (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
- watch with a second hand
- metric ruler
- zip-lock plastic baggie
You will (with a parent):
- Label one plastic cup ‘Borax Solution’ and the other cup ‘Ball Mixture’.
- Pour 2 tablespoons warm water and 1/2 teaspoon borax powder into the cup labeled ‘Borax Solution’. Stir the mixture to dissolve the borax. Add food coloring, if desired.
- 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.
- The ball will start out sticky and messy, but will solidify as you knead it.
- Once the ball is less sticky, go ahead and bounce it!
- You can store your plastic ball in a sealed ziploc bag when you are finished playing with it.
- Don’t eat the materials used to make the ball or the ball itself. Wash your work area, utensils, and hands when you have completed this activity.
Have a blast!
Source: idea is from ChicaCircle;
how-to-ingredients&instructions are from Anne Marie Helmenstine, Ph.D., About.com Guide