My wife would like something that cleans up after the kids (safely, etc). I would like something that turns things off when people leave, but I suppose smart s

My wife would like something that cleans up after the kids (safely, etc). I would like something that turns things off when people leave, but I suppose smart switches would do the job cheaper than a robot. Not as cool, though, especially if it were like an inexpensive little "monkey bot" about 3 feet tall :-)