Package Contents: 4 * Blue + Red + Green + Purple Molar Bar Chew Necklace Building Block 1. Sensory Chew Chain Our sensory chew necklace is made of high quality silica gel, which meets your requirements. They are durable, soft and healing. It can also prevent nail biting or thumb sucking. 2. Research on colors to reduce stress and anxiety shows that bright colors can lead to aggressive, hyperactive, and inundating stimuli (especially yellow, orange, or bright red). Our chew tags are printed in soothing, soothing colors. It is ideal for children with agitation, autism, ADHD, aggressive chewing and SPD. 3. It is easy to tear off the fasteners to ensure safety. Your chew chain is equipped with a breakaway buckle to make the bite more secure, choke and prevent accidents. Great chew jewelry with mouth movement for little boys and girls. 4. Non-toxic food grade silicone rubber products contain no BPA, latex, phthalate, cadmium, lead or metals. It also applies to adults (men and women) and adolescents. 5. The durable silicone sensory chew necklace for most children is made of durable silicone material with strong chewing power.