NOTE : After a customer contact us about the potential safe problem of the metal clip and small bell, we've changed clip to cotton rope on the top and raplace bell with bigger size. Safer, Easier to hang in multiple places, good decoration for parrot's cage. MATERIAL : Parrot chewing toys made of porous mineral stone, rich of calcium for pet's health while grinding bird's beak. ADVANTAGES : Colorful beads between lava stones and the bell on the bottom attract parrot's attention, reduce loneliness, good for parrot's psychological wellness. DESIGN : Star shaped design of the stone make it easy for parrots to trim and clean their beak. WIDE FOR : Not only as bird supplies(African Greys Amazon Conure Cockatoo Eclectus Budgies Parakeet Cockatiel), but also for rodents to grind teeth(Hamster Chinchilla Rabbit Mouse Squirrel Gerbil). Best for small animals under one year of age.