Yes, the head bone is connected to the jaw bone, and this jaw bone chomps away like mad in the dark. This electroluminescent and animated skull mask shines creepily in the dark while snapping its jaw. Comes with eye-socket suction cups so you can mount it inside a car or house window, plus a 6" lawn stake, and an 8" handle to hold it in front of your face. Truly versatile. Runs on 3 AA batteries that are included.