Construction play that’s just right for babies, with 2 easy-grasp vehicles to send down ramps, boulders to drop and load, and even fun music and sounds! Requires 2 AA batteries. Develop & Learn Boulders to lift & load Grasping & placing boulders fosters eye-hand coordination. Music & sounds Stimulates senses & encourages curiosity as baby figures out how to start music & sounds. Two push-along vehicles Moving vehicles along & crawling after boulders strengthens baby’s gross motor skills. “Magic” surprise Rewards baby’s actions, building confidence.