Well there are 2 things we should be able to rule out.
1. There most likely won't be 5 different game pieces because then you get lots of bots with the same manipulator.
2. water+electricity=bad
From looking at other posts though, the merry-go-round thing
http://www.chiefdelphi.com/forums/sh...3&postcount=10
looks possible, I mean, they can be small and they would add to the dificulty of movement (mecanum anyone?) and medicine balls aren't too expensive and do come in the 5 pound size... but I'm not gonna go crazy trying to figure out the clues, I'll just wait till the 6th.