A peumatically operated playing device for randomly casting at least one discrete article includes a substantially rigid cubic enclosure having a first opening on one wall thereof and a second opening on another wall thereof; a first elastic membrane covering the first opening; a second elastic membrane covering the second opening; a retraction element on the first elastic membrane for retracting the first elastic membrane; and the substantially rigid enclosure and the first and second elastic membranes defining a hermetically sealed chamber within the substantially rigid enclosure, such that retraction of the first elastic membrane results in a consequent retraction of the second elastic membrane, and subsequent release of the first elastic membrane causes the second elastic membrane to impart a force to any discrete articles which may be positioned in engagement with the second elastic membrane. The device is easily adapted to a randomizer for a dice game, a lottery game, a tic-tac-toe game, and other games where dice are cast.