Buckaroo! is a game of physical skill, intended for players aged four and above.

The game centers on an articulated plastic model of a mule named "Roo" (or "Buckaroo"). The mule begins the game standing on all four feet, with a blanket on its back. Players take turns placing various items onto the mule's back without causing the mule to buck up on its front legs, throwing off all the accumulated items (the toy has a spring mechanism that is triggered by significant vibration). The player who triggered this buck is knocked out of the game, and play resumes. The winner is the last player remaining in the game. In the (unlikely) event that a player manages to place the last item onto the mule's back without it bucking, that player is the winner.