Invented by Debra Beckman, MS, CCC-SLP and developed by ARK, the Tri-Chew has ridges, bumps, and swirls on each end to simulate the various textures of food used for chewing. Jaw movement and pressure can be experienced through the varied sizes of the ends, which are also small enough to prevent gagging. The textured sides provide sensory input for the lips, gums, and tongue. The triangular shape makes it is easy for little ones to hold. Recommended for ages 6 months-2 years. Not recommended for aggressive chewing.