- The Infant Trainer™ from Myofunctional Research Co. (MRC) is an active exerciser that encourages your child to chew correctly while using the jaw muscles. - Most importantly, the Infant Trainer encourages your child to breathe through their nose while simultaneously training them to swallow and position the tongue correctly. - Research clearly illustrates that correct facial, jaw and dental growth depends strongly on all of these factors. **For further product information, please contact Chat Support**