My 4 year old son has PDD-NOS and only eats about 10 foods. None of these are healthy. We are working with an OT. He is constantly wanting to suck on things and I am tired of handing him sugary suckers and popsicles all day. Does anyone know of a sensory toy or something that he can suck on for long periods of time that doesn't make noise and that isn't going to make him drool a lot. Also, it needs to be pretty smooth because he cannot tolerate rough texture. Thank you.