The smooth natural wood ring holds three colorful keys with food-grade silicone guards and different textures for a sensory experience. The attached fob has a natural wood top, and features light-up buttons that coordinate with the faces on the keys, so babies know which animal sound they will hear when pressed. Press the Mirari logo to activate a lovable giggle sound. Each key measures approximately 3-1/2". For ages 6 months and up.