Got twenty prototypes of my new card game in the mail. Hurrah. It's fun, I think!
Teams draw one card from each of three decks (Product, Angle, Market), and have limited time to invent entirely new (and outrageous) product ideas according to a set of wacky constraints.
As the instructions say: "If you have to choose between creative and rational, go with creative every time."
The teams then take it in turns to pitch their crazy new products (as if they were actually commercially viable ideas) in 30 seconds or less to the other groups.