I’m sold on this one. A self-propelled vacuum cleaner with insectile intelligence. It cleans by chaos theory, mindlessly bumping into furniture and walls until, by sheer chance, it vacuums the whole room. All that for only $200. Here’s an idea for a cool additional feature: it should have a solar panel and a photo-sensitive sensor. That way, when it’s about to run out of electricity, it will find the brightest point in the room and recharge.