This musical mobile runs on batteries, so the music sleep time will last until it is turned off!What is developing with this wonderful musical mobile?-Sensory skills: Calm music is heard while the mobile slowly rotates, minimizing stimulation and relaxing your baby.-Safety and happiness: Familiar melodies and faces welcome your baby again and again as they become part of the bedtime routine.-Gross motor skills: the mobile will stimulate your baby to reach out and touch the sweet little friends, helping to...