This is so much fun, seeing all the cats in boxes. I had a box from a grill (large) and taped up the top flaps so it peaked like a roof, then cut out 2 doors and some windows. Then I got contact paper and covered it up. That was hard because I had to cut out all the door and window openings. Abby loved it, but then she decided to sleep on the roof - and she collapsed it! She had the Cat House for a few years, and then lost interest. The contact paper started peeling, so I finally tossed it. Maybe I should make a new one - if I can find another big box.