A Timeless Game
Originally the "knucklebones" were those of a sheep, which were thrown up and caught in various manners. Modern knucklebones consist of six points, or knobs, proceeding from a common base, and are usually made of metal or plastic. The winner is the first player to successfully complete a prescribed series of throws, which, though similar, differ widely in detail.
The origin of knucklebones is closely connected with that of dice, of which knucklebones is probably a more primitive form.