You could certainly buy a ready-made robot to sweep your hardwood floors, but doesn't building your own out of Lego bricks sound like loads more fun? That's what PlastiBots did with the Pulito pictured above, a Lego Mindstorms NXT sweeper with a host of sensors to navigate around furniture and a standard Swiffer pad to scrub. There's no fancy NorthStar or Celestial navigation packages to keep the bot on track, so it meanders about much of the time, but there is an fancy
