The ultimate cat toy.
If you have hardwood floors and hate sweeping, but can't afford a Roomba, then cat ownership might be the answer to your problems. Simply adopt a cat from your local shelter, slide it across the floor, and if for some reason he comes back to you instead of running off and hiding under a bed for the next several days, keep tossing him around the room until it's clean.
Sure, your cat will be filthy. But unlike hardwood floors, they clean themselves!
(by Jonathan Corbett)