The boqii Cat Toys for Indoor Cats Smart Balls are perfect for any cat owner who wants to provide their cat with some extra stimulation. These balls come in a set that includes a semi-enclosed scratcher, smart cat ball, and a tumbler plush ball. With these balls, you’ll be able to satisfy your cat’s need for playing, scratching, and sleeping. They’re made of 100% recycled paper pulp material and are available in a variety of colors and patterns.