Provide gentle, calming sensory stimulation to the mouth, cheek, and lip area using these colorful Vibe Critters™. The bumpy textures and ridges on the interchangeable facial/oral massager heads are great for improving sensory perception. The characters screw easily onto the vibrating wand. Use the adjustable turn-dial to regulate vibration intensity. After using the Vibe Critters, return them to the handy storage tin. Critters are made of soft, durable plastic. No latex. Bat is 4" x 2 ½". Fish is 2 ¾" x 2 ½". Base is 6 ¼" x 1 ¼". Includes 2 AA batteries — one for each wand.