These pendants have been designed as non-toxic sensory jewelry. They can be worn by mothers as teething/nursing jewelry or used by children over age 3 for sensory support. Our bangles have also been approved as a teething toy for infants. All of the chewable jewlery products have been designed with children in mind. Our products have small bumps to stimulate your little one and help to keep interest while nursing or playing. All Silicone products are FREE from BPA, PVC and Phthalates, Cadmium and Lead. Our jewelry is tested by a CPSC approved lab and conforms to standards as both children's jewelry and as a toy. This ensures that our products are made from the safest materials available. All Siliconies necklaces come with a break-away clasp and can easily be adjusted to meet individual needs.