Need some heavy mouth work to discourage destructive chewing? This tough chewy promotes sensory integration for biters and grinders. Tactile ridges along the flexible vibrating stick provide an oral motor workout. Use with our without vibration to reach deep into the back of the jaw or to massage facial muscles. Requires 1 AA battery (not included). For moderate chewers. 9L with 2.75L tip. 1lb. Plastic handle with non-toxic PVC chewy. Latex-free. Green and blue. Surface wash. Use with adult supervision. Ages 3 and up.