Smart Rolling Pet Ball

Some animals are insulted by most toys and briefly obsessed with a few. This is aimed squarely at the second category. The ball rolls and darts on its own, changing direction in a way that reads, to a cat or a curious dog, as something alive and worth chasing. There is a little rope tail on it for the part where they catch it and want to wrestle. You switch it on, it keeps them busy for a while without you throwing anything, and it stops when the batteries or the animal lose interest, whichever comes first.