Amaze your kids and teach them a lesson about polymers by making a bouncy ball with glue. Polymers contain long strings of molecules that connect together to create the polymer material. The characteristics of the polymer material depend upon the molecules contained in the polymer. A homemade bouncy ball is an example of a bouncy polymer that you can make using basic household ingredients.
Measure and pour the white glue into one small container. If you are using food colouring, add several drops to the glue. Mix the glue and the food colouring with a stir stick.
Mix the warm water and the Borax substitute together in the other small container, stirring with the other stir stick until the ingredients mix completely.
Measure the cornflour and add it to the glue. Add 1/2 teaspoon of the Borax substitute mixture to the glue also and mix everything together well with the stir stick. As you stir, the mixture will become thicker.
Pour the mixture from the container into the palm of your hand. Use your hands to knead the ingredients gently and roll the ingredients into a round ball shape. As you continue to work with the mixture in your hands, it will get harder and less sticky.
Bounce the ball onto the floor or ground. It should bounce easily. Store the ball in an airtight container with a lid or it will dry out.