I have a decent sized satellite dish on a metal stand that I though would be fun to turn into a mechanical game spinner that is left out somewhere downtown or a high traffic area that people could walk up and push a button, and then the spinner would land on an instruction in the dish. A webcam could be rigged up to broadcast or at least record people's reactions. Other ideas/options include a musical or flashing light reward if they do it, controlled remotely by someone nearby.
I'm great at ideas - not so much on mechanical implementation, though I'd love to learn more. anyone interested in helping to make this happen?