Chewy Tubes offer a safe, non-toxic surface for developing biting and chewing skills. They are latex-free and lead-free and do not contain PVC or phthalates. Therapists may select Chewy Tubes for use in treatment of individuals who are developing initial oral motor skills or rehabilitating the jaw after surgery. Youngsters seeking additional proprioceptive input into the jaw may also like biting on Chewy Tubes. Children with autism require professional supervision when using Chewy Tubes. They are not recommended for children under 7 months of age. Set of 2.