Simple, but unique bird toy. Another balsa wood lovers dream. The chain goes all the way through the center so it will last until the entire block of balsa wood is chewed. We have added some fun and colorful little fish to the outside on all four sides. On the bottom and top we have added mini interstars and square rings to move around, up and down. If your bird is less destructive, hang this on the side of the cage. If your bird is more destructive, hang it in the center of their so when they chew it spins around and around for an added challenge.