Make Your Own High Bounce Ball

The bouncy ball granules are mostly composed of polyvinyl alcohol (PVA), which is a water-soluble polymer with elastic properties. Polymers are long, tangled chains of carbon, hydrogen, and oxygen atoms. When the granules are moistened, their surfaces start to dissolve slowly, they swell up a little, and they become sticky. The long polymers get tangled up in each other. In this way, the granules stick together inside the mould.

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