On Facebook I had recently found a pretty cool page over there. It is called Tiny House Design and they show all sorts of houses that people have designed with a wide variety of items.
The one in the picture above caught my eye as someone took a piece of corrugated pipe and made a small house from it. It looks like a one room house, maybe something for those guests you have over?
Its pretty cool to see the ideas that everyone comes up with. It gives you all sorts of ideas on how to re-purpose items that you see laying around.