Very Cute Fisher-Price "Dancing Animals" Musical Crib Mobile. Vibrantly colored animals are mid-weight foam material and are slanted down to catch baby's interest. Wind-up operation and on/off switch - plays Brahms' "Lullaby." Clamp can be attached to any side of baby crib, bassinet, playpen, etc. - sturdy and quickly movable. "Swing-away" arm to move device over baby crib, or out of the way. Just used a couple times when taking a trip.