Abstract: A synchronized drive device for the lips of a doll arranged to be driven in response to audio signals from a receiver or sound carrier within the doll. The device is entirely self-contained and insertable into and removable from the doll. It includes extending drive arms which may be connected to the lips of the doll. The device comprises a mouth frame, a principal machine for producing the audio signal and a control box and the connection from the control box to the upper jaw and lower jaw. The central part of the mouth frame receives the control box which can be connected to the mouth portion. The control box has drive rods for the upper and lower jaws driven from the control box. The control box includes an electromagnetic motor which is responsive in its operation to the audio output of the principal machine within the doll to rotate a gear that is connected to the drive rods to pivot them. The sound device drives the motor to move in forward and return directions to move the jaws apart and together.