Nuby Ice Gel Teether Keys Nuby Ice Gel Teether Keys contains nontoxic purIce gel that lets it stay cool for a long time. Its cool textured surface soothes and stimulates sore gums. The teething nubs can help massage tender gums. The bright colorful shapes stimulate your baby visually and also help with eye-hand coordination. Age: 3 months and up Features Helps in eye hand coordination Bright and colorful shapes Teething nubs help massage tender gums Textured surface soothes and stimulates sore gums