Robots for the house

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I'm staying with a friend of mine who's got these incredible devices. They're little flying saucer shaped robots that clean his floors. There's a vacuum called the roomba and a mop called the scooba. He literally just pulls the random piece of furniture aside and sets them loose before he leaves the house and he comes home to clean floors. I just thought this was the coolest thing and had to share. I'm currently looking for an apartment in NYC and plan to pick up a set of these for myself as soon as I find one. Absolutely brilliant.