Bernie DeKoven’s Funlog reminds me of roofball, including a link to Roofball.com. Wow… brings me back to high school, which is where I played. We never used a tennis ball, which the Roofball.com site illustrates. Instead, we followed the DeKoven quote:
“The best roofball ball is one of those cheap, light-weight jobs, about 10 inches in diameter, with all the swirly colors. You find them at the drugstore, dollar store, toy store, and even the supermarket when they’re “in season”.
Also, you could not let the ball hit the ground at all. I wasn’t a master, but I held my own.