A real, working catapult in miniature for your desktop! Have fun launching small wiffle balls or ping-pong balls across the room - distances over 18 feet! Project measures approximately 12-1/2"H x 16-1/2"L x 6-1/2"W. Order a package of #7339 Rubber Bands, 4 each #W203 Wheels and one each #7164A Dowel separately.