A toothbrush with a handle having a base and a head and defining a cavity positioned between the base and the head. The toothbrush also includes a plurality of bristles attached to the head of the handle, a green light configured to flash for a first period of time, a yellow light configured to flash for a second period of time, and a red light configured to flash for a third period of time. The toothbrush also includes a switch coupled to the handle for activating the green light, and a circuit for automatically activating the yellow light after expiration of the first period of time and for automatically activating the red light after expiration of the second period of time.