We've played a game where I put technique names in one hat, attacks in another, and modifiers (tenkan, irimi, etc) in a third. The students get in groups pull one from each hat then go and try to make what they've drawn from the hats. Then they teach it to the rest of us
I don't care if they come up with a viable technique...sometimes the answer is it just won't work...it's the process of trying to figure it out that's important.
Bronson