This is not really a gadget but I thought it was sort of interesting.  The world’s smallest house.  It is really a bite size house probably only suitable for one person? Maybe you could fit two in there but it might be sort of narrow around the corners.

I would have never thought of an entire house as a gadget, but this one sure does come close.  I wonder where they sleep in that thing?  Maybe if they got rid of all those books they could sleep vertically in that space.  Hmmm.  I think I would rather have a tent than a little wooden house like this.  But I suppose the one big advantage to having a house like this is the portability factor.  Don’t like where you live? No problem, simply put that thing in the back of your pickup truck and settle down somewhere else… hmmm.