Ball Roll Exercise - I'm a B.Ball worker from way back, and I'm finding that using a ball of modeling clay - the oil based kind, is very good exercise and seems good for the skin. It works best when warmed up from the hands. Rolling it on a hard surface yields a pretty good sphere. When warmed up it palms really well too. Keep it in a baggie to keep lint off of it.

The polimer based kind, which you can bake and it hardens, works too, for this, just don't bake it. p.s. You can make certain gimmicks with this kind...comes in flesh color etc.

Plasticine and Plastiline are the same. These are the children's modeling clay we've all heard of. I'm not referring to Play Dough.

I used the balls supplied with the Multiplying Sponge Balls (Chicago Ball Trick). They're denser than typically available sponge balls.

Reminds me of the old Ireland golf balls, which looked good on stage.