[Eric Archer] constructed an analog computer to model the physics of a bouncing ball. The core is a TL074 opamp that does all the integral math. He had no trouble finding descriptions of analog ...

Here's how to get more bounce from a normal tennis ball - buddy it up with a heavier ball for twice the impact. Hold a ball in each hand and decide which ball weighs more (has greater mass).

and develop movement-sequences based on ball-skills and ball-games. Action: Combining hand and feet patterns. Trotting, bouncing and spinning. Whole-body wobbles and wiggles. Dynamics: Lively ...