This is the story of our last family DIY project: a cat-house for our male Maine-Coon, who discovered that his hormones are functioning well and so he started to mark his territory in house. Bad idea :P that territory is already owned by me. So, to make everyone happy we decided to make his own outside (in our case that means on the balcony) space with his own house in it. We used cheap materials, I admit, we only need the house to survive a year or two and most of the effort went on making the boards water-proofed. By now the house is functional, although not yet finished. I still need to crochet him some nice warm baskets, caves, other stuff to crawl in :)