Safe, stylish, and discreet brick design kids will love! Textured necklaces provide sensory stimulation Mega Bundle includes 4 chewy necklaces and a bonus pencil topper Adjustable cord with breakaway safety clasp. Safety & Washing: All Senso Minds Products are made FDA Compliant, Food Grade Silicone, FREE of BPA, Phthalates & Petroleum Based Plastics Chew Necklaces are Dishwasher Safe and can be cleaned via Warm Water & Soap!