Shake the easy-to-grasp rattle and sing puppy to hear the colorful beads rattle Rattling The puppy also causes the puppy's cheeks to light up and introduces the concept of cause and effect The music button plays fun phrases, sounds and songs; features 20+ songs, melodies, sounds and phrases Colorful, crinkly ears provide visual and tactile stimulation; two textured rings rattle and turn to build motor skills Requires 3 LR44 batteries (batteries included for demo purposes only; new batteries recommended for regular use); intended for ages 3 months to 2 years