9 Sources of fun and sensory stimulation! Our fun-filled, wall-mounted activity centre provides a wide array of features for somatosensory stimulation: a bright blue plate which vibrates when pressed; a wooden roller that turns on a music box and lights; a pull-ball which turns on a fan; a large, yellow plate which switches on a bright light; a bead chain curtain with an unbreakable plastic mirror; one push button which activates a buzzer; one push button which activates a fan, and a push button which activates a music box and lights. Mounting hardware included. Size: 21½" x 18½" x 4". Requires 2 C Batteries.