Reusing the gifts paper

Every year we throw lots of gift paper to the garbage can. This Christmas my father decided to reuse some of card paper to make this cool house.

The house design is cool and simple - my father just did it while we were opening the presents, from a single piece of paper card, on a very elegant and simple design. I'll try and reverse-engineer the schematics and post it here. Hopefully next year we'll waste less paper while creating new toys :)

If someone knows of a site with schematics with this kind of models please post me a comment. Thanks in advance.

Merry Christmas