[Mark Hamilton]

How about a "ball pit" like you see in the kiddie playgrounds. You know a soft surface covered in a layer of hollow plastic balls. Should be interesting. We might replace the hollow balls with tennis balls or something if they prove to fragile. I can only imagine the chaos that would result from that. It'd be pretty easy to dig in and resist movement, so the game would have to be designed with to discourage that. The purpose of the game could actually have something to do with manipulating the playing feild...and yes I'm only half joking. A pit of much smaller balls could even give us the experience of water without the inevitable release of magic smoke.

Now that my insane idea is finished, I'd just like to point out that whatever you suggest, remember it has to protect the floor underneath it very well, as some first regionals are held on gymnasium floors (which are easily damage by robots).