Who was the inveter of the bouncey balls?

Question

where was the bouncey ball inveted? who invented the bouncey ball? how was the bouncey ball made?

Answer 1

Some caveman took a rock and bounced it, then after many generations, rocks got softer, and now they bounce!!!!!!!!

Answer 2

"The Super Ball was invented in 1965 by California chemist Norman Stingley in his spare time.

It is an extremely elastic ball made of Zectron, which contains the synthetic rubber polymer polybutadiene vulcanized with sulfur at a temperature of 165 degrees Celsius and at a pressure of 80 atmospheres."