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 or feeding. 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 21/2" tall. Fish is 23/4" x 21/2". Base is 61/4" x 11/4". Includes 2 AA batteries- one for each wand.