Give each team an assortment of candy bars. In five minutes, each team will be required to fashion a particular animal or object by molding or melding the candy bars together. Animals, famous buildings or famous personalities are all fun options. If you like, throw in toothpicks to help hold the candy bars together or otherwise provide more stability.
This game can get a bit messy, but it is great fun.
Option #2: For a lower-cost option, bubble gum/chewing gum can be used instead of candy bars.