If some of your ping pong balls are dented or crushed, don't worry — they're still usable. To restore their shape, immerse the balls in a pot of hot water or pour boiling water over them.

He calls it the Ping Pong Mauler and we think that’s an appropriate name. It doesn’t just lunch a ball, it belches forth a relentless barrage. He certainly has no shortage of ammo. A few ...

[Jacob] has put a slightly new twist on the levitating ball trick with his ping-pong ball levitation machine. We’ve all seen magnetic levitation systems before. Here on Hackaday, [Caleb] built ...