For some odd reason my PCs all have a passion for killing or injuring Kobolds. So over time a few mini-games has risen and are used in most of our campains, they include: A Kobold Throwing Range (we used strength and ranged modifiers to figure out distance), Target Practice (yell "pull" and a heavily armoured Kobold is launched by you, see how many you can hit in a row), Kobold Racing, Charm the Kobold, Hide the Kobold's Shovel (putting it in an extradimensional space is cheating) and a few others that are either not worth mentioning or innapropriate for the forums. Other games we play are The Reincarnate Game, Summoning Battles, we even had a Triathalon once...
Thats about all i can think of at the moment, have a peachy day.