I am using this with an adult to help stimulation after nerve damage occurred from oral surgery. It's a great product.
Long enough to reach the back molars, with sensory bumps|||ARK's Textured Bite-n-Chew Tip XL is a tip attachment for the Z-Vibe® specially designed to work on biting and chewing oral motor skills. At 2.5 inches total in length (2 inches long when inserted into a Z-Vibe handle), this tip can reach all the way to the back molar area for chewing exercises and/or for sensory input. Use it promote a sustained bite, develop jaw strength and stability, practice rhythmic and rotary chewing, and more. It can also be used outside the mouth on the cheeks and lips for added stimulation. It's similar to the standard Bite-n-Chew Tip XL, but has added bumps to gently de-sensitize the mouth and work on texture acceptance. The texture also simulates the feel of real food for realistic non-food chewing practice.
Caution: this therapeutic tool should be used under adult supervision at all times.