The Go! Cat Go! Zig-N-Zag Ball® has a weight inside, making it zig and zag across the floor. The unpredictability of where the ball will go will keep your kitty engaged!
Cat is terrified of this thing. And it is not rubber like i assumed, my fault, but it is more like hard plastic like you would find on a watergun. Cheap tho so I dont feel that bad for buying it.