Wanna have some fun?
Teach a kid to play chess. While I don't know much more than how the pieces move and that a player is supposed to be thinking dozens of moves ahead, I was able to introduce the game to a 9-year old I know. She took to it rather well and seemed to enjoy herself.
Since then I've been doing a little practicing with a nifty, compact program called Pawn (get v1.53 from download.com or v2.67 from the author). I'm no great shake, as you may have guessed, but I've managed to win about 50% of the time against the computer's "dumb opponent" settings.