Polyester/Plastic Provides visual/auditory stimulation and promotes brain development Plays for 20 minutes with volume control and on/off switch Visual tracking of the plush animals promotes brain development Plays Twinkle Twinkle Little Star, Brahms Lullaby and Rock-A-Bye-Baby Helps baby self soothe and promotes a good night sleep Two taupe minky giraffes with an eyelash trim and two gray elephants with embroidered ears rotate under a canopy of embroidered leaves. Add to that a friendly furry sloth with hook and loop material that attaches to the cream colored scrunchie which covers the mobile arm. The musical mobile rotates to nursery songs for 20 minutes, has an on/off switch and volume control. It plays Brahms Lullaby, Twinkle Twinkle Little Star and Rock-A-Bye-Baby. Requires 3 AAA batteries not included.