Had it with unwanted visitors but too shy to send them packing? Here's a non-confrontational way to rid yourself of intruders. The Motion-Activated Garden Sentry sprays a "forceful yet harmless" stream of water when a visitor enters its field of view. Hammacher Schlemmer promises that "the sudden noise and movement of the sprinkler frightens the uninvited guest....while discouraging return visits." Of course they're talking about small cats and deer, but that's not to say the water won't send a "thanks, but no thanks" message to Jehovah's Witnesses or third-graders selling wrapping paper.