here are the best ones so far

Design #1205023388
It's a web page that has velcro pads on the side! It fetches help in the event of an emergency and must be replaced every morning.
Design #2504898968
It's a letterbox that detects explosives! It can play the trumpet and changes colour to reflect your mood.
Design #3496045654
It's a laser-printer that tells the time, dispenses pills and makes you invisible.
Design #3273699102
It's a CD-rom that doubles as a tricycle!
Design #354148059
It's a video recorder that can cook small meals! It is audible only to dogs and has no moving parts.
Design #1116555248
It's a parachute that doesn't need oiling, is invisible to the naked eye and mows your lawn.