Go to your local meat market and purchase a cow tongue (yes people eat them, usually boiled!) Keep the tongue frozen until the day you play, then thaw it out so it's fairly stiff when you start out. Play a game of football using Pass-Go a.k.a. Ultimate Frisbee rules and use the cow tongue instead of a frisbee or football. The longer you play, the less frozen the tongue, the more floppy the action. Kids will come out in droves just to see people throwing a cow's tongue to each other!
Follow the game with a devotion on the importance of "taming the tongue" from James 3:3-12.