Grey Feather Large Busy Bird Balls are treat dispensing rolling toy for your avian companion. The clear ball lets your bird see their favorite treats or toy parts inside. Busy Balls include a colorful marbella bead which makes an usually fun noise to attract curious beaks. Whatever items fed into the top opening of the ball will come out randomly. The colorful bead will remain inside. 4.5" Round. NEARLY INDESTRUCTIBLE!