Thanks very much to Tove, who posted this neat idea to the Guiding Mailing List!
Fill one cup halfway with water and add a spoonful of borax. Stir. Some of the borax should still be visible at the bottom after you stir.
Add enough white glue to the second cup to fill it a quarter of the way. Add an equal quantity of water so the cup is half full (this is to the cup of glue). Then add a drop or two of food coloring. Stir this together with the second spoon.
Pour half of the coloured glue and water mixture into the third cup. Add an equal amount of the borax and water mixture to the third cup.
Stir this combination together. It will change to something very different.
Take out the putty, squeeze out the liquid, and roll it into a ball in your hands. Test to see if your ball will bounce when you drop it on a hard surface.
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