Extra Small Ball Thing toy is a great toy for birds that love to play. Its made with durable; multi-colored java wood; sisal rope and round wicker balls. Perfect for birds that love to chew; shred and tear. Easily attaches to any cage with a quick link. You can add your pets favorite treat inside for added foraging fun. This toy measures 6"x6"x8" and is best suited for medium sized birds such as cockatiels.