Now comes with convenient on/off switch. Encourages exploration! This fun-filled activity centre provides five stations for somatosensory stimulation: a bright yellow plate activates an AM/FM radio, a large red plate vibrates when pressed, a wooden roller sounds a buzzer, a pull ball turns on a music box, and a large orange plate turns on a bright light. Each of the switch plates has been designed to enhance sensory awareness. Size: 15" x 11½" x 4". Requires 2 C Batteries.