I don't plan on building this, mainly because of my lack of skill and money, but I had the idea to hack open one of those cheap hand held games (like chess of checkers) and hacking the outputs to the screen to a mechanical hand that can actually play the game, sense what the human's move is, and respond to it.
I would love to see this built, but like I said, I'm inexperienced and poor...

Let me know your thoughts!