Spinning colourful gears and merry music make the MUSICAL GEAR CENTER toy perfect for lively babies! Drop the ball through the shoot, and then press the cheerful critter to make it twirl and pop out for smiling baby to chase after while the music plays. Spinning the side gears sends the happy face turning round and round. As baby's fine motor skills begin to develop, the MUSICAL GEAR CENTER toy offers exciting new ways to play - baby can now stack and reconfigure the interchangeable gears for even more silly, spinning fun. The MUSICAL GEAR CENTER toy includes five interchangeable gears and two EXPLORE 'N GROW balls, compatible with all other gear and ball products in the line. Requires two "AA" batteries, not included.