That would be pretty sweet, i was thinking of making some Tori puppets =}
It would be pretty cool, if you used magnetic ball bearins inside ping pong balls i recon you could get them to move and rip off. Then you could have coils in the fists, and on the puppet handle things (what ever they are called) have buttons to send current through the coils, and so you can grip.
It would be pretty awesome, even if you didnt make them puppets, just action figures XD