EFFECTIVE IN REDUCING ANXIETY AND STRESSNecklace are a safe and discrete alternative for individuals with sensory needs (Autism, ADHD, PDD etc.) It greatly reduce anxiety & stress, help stay calm and effectively stop them from chewing shirts or biting fingernails.100% SAFE AND NONTOXIC: Our teething toy are made of high quality food grade silicone. Non-toxic, BPA free, latex, phthalates, cadmium, lead, or metals.Fashionable, nontoxic, no damage to body, environment-friendly.USER-FRIENDLY DESIGN UPGRADE: Each chew tool comes with a cord and breakaway clasp for safety purposes. Cord and Clasp are not for chewing, children should be reminded to chew only on the Silicone brick.Durable and Long Lasting (Suitable for All Chewers) Sensory toys for autism are made of high quality tear resistant material, can gently chewed and used for a long time.