The nursery is completely submerged in a soothing atmosphere of submerged lights and sounds thanks to the ocean wonders mobile with remote control. Moving lights are projected throughout the room by the mobile. When the baby outgrows the crib, you can use the Grow with Me mode to put this mobile on a nightstand or dresser. Mom can turn it on with the remote control without waking up her sleeping child. 4xD and 2xAA are needed. No batteries are included. Birth: Five Months