ARK's Krypto-Bite® Gem Necklace provides a safe wearable and discreet solution for kids and adults who need to chew. Use this ""chewelry"" as an oral fidget (or even hand fidget) to help calm soothe and self-regulate during times of stress or to better focus during homework and other activities.Age suitability: 5 years+Warning: To be used under the direct supervision of an adult. Not suitable for children under 36 months.standard - recommended for mild chewers