PhysioRoll

Speaking of odd-shaped balls, here's the PhysioRoll - a kind of dumb-bell-shaped ball. What, perhaps, one might consider calling a "Dumball."

All of which is to continue on the theme of changing the shape of sports by changing the shape of its, umm, play objects. Dumballs, Eggballs, could each and both lead us to the invention of volleyball and perhaps even soccer variations of the non-round-ball type. Each of which, as Burton Silver so lyrically implies, could "challenge human ingenuity and reinvigorate the human spirit "