10/30/50pcs Pet Cat Toy Ball Plastic With Bell Hollow 3.8cm Cat fun throw` | eBay
The KittyBall™ - Smart Cat Ball – KittySpout
Cat Toy Balls with Bell, TUSATIY Colorful Soft Fuzzy Balls Built-in Bell for Cats, Chewing Toys Interactive Cat Toys for Indoor Cats and Kittens 3 Pack