Children's Jewelry, Ages 3+. No BPA, no phthalates, no cadmium, no lead, no metals. 100% silicone beads that GLOW IN THE DARK. Easily cleaned with dish soap and water, also dishwasher safe. Necklaces have a breakaway clasp for added safety. Beads glow in the dark after exposure to light source. Sunlight or indoor bulbs are suitable. Longer exposure to light source generates stronger and longer lasting "glow". Necklaces are approximately 20" long.