I'm crocheting a triangle out of strips of sheeting to make a "sling" for the cats. It goes inside a wooden frame and is held on the three corners with hooks and the cats can get in and sleep or do whatever cats do when they are just laying around
I acquired a 2' X 2' X 4' high plywood cat "house" that was covered in yucky smelly carpet which I ripped off. We have since cut out holes in the plywood and painted it and there are to be two "platforms" to be made and placed inside the box and we have a third wooden platform on the top. I've taken pictures as we go and I'll post when it's all complete.