Playskool Musical Activity Ball and Gear Center The active play, twirling fun and happy music just goes on and on Exciting and engaging ball-drop and turning gear set lets baby activate the action to get the balls rolling, gears twirling and music playing Gears can be removed for stacking fun as baby grows older Balls fit other EXPLORE N GROW ball sets, gears fit other EXPLORE N GROW gears sets and each sold separately Set includes activity center base, ball arch, two balls, five gears and instructions