A Super Ball (aka SuperBall) is a toy based on a type of synthetic rubber invented in 1964 by chemist Norman Stingley. It is an extremely elastic ball made of Zectron[1] which contains the synthetic polymer polybutadiene as well as hydrated silica, zinc oxide, stearic acid, and other ingredients.[2] This compound is vulcanized with sulfur at a temperature of 165 degrees Celsius and formed at a pressure of 3,500psi. The resulting Super Ball has a very high coefficient of restitution,[3][4][5] and dropped from shoulder level, a Super Ball snaps nearly all the way back; thrown down by an average adult, it can leap over a three-story building.
Toys similar to Super Balls are more generally known as bouncy balls, a term which covers other balls by different manufacturers with different formulations.