Colorful and natural foot toys that provide birds with chewing and foraging fun. Balls come assorted in a 6 pack. Each ball is 100% bird safe as they are made from natural vine. The vine has been formed int a sphere and are brightly colored to be even more enticing. Lightweight with hollow centers to add shredding or your favorite foraging treat. Each ball measures around 3.25 inches in diameter. Donate this item to the Cincinnati Zoo for our very own birds to forage and play with.