I built a house in my freshman year, fall semester, that was six feet tall and collapsible, made up mostly of found materials; I built four 3' x 4' wooden frames and two 3' x 3' ones, stretched mesh across them, and stitched found fabric, found paper, and in the case of the the roof panels, discarded CTA cards over all the surfaces.
After the semester ended, I didn't really know what to do with the house. Each panel was connected by hinges but even in its flat aspect it took up a lot of room. So I dismantled it and discarded every piece but my two favorite walls, and the ornament I had hung inside.
I've kept those two favorite panels since then, and now they hang in the entrance to my apartment.