The Ocean Wonders aquarium is a soothing device that attaches to the crib and captivates baby with its mesmerizing water movements • Charming classical music plays one of 5 songs (or one of 3 sound effects) as the bubbles rise to the "surface" • Lifelike movement of the mother fish makes it appear as if she is swimming through the water, closely followed by her baby • Up to 18 minutes of continuous music • 4 classic style songs, 2 effects sound. 3 modes of use: 1 = sounds, lights and aquatic and underwater movements. 2 = sounds and lights. 3 = wires only