While making a Hallowe'en costume for my daughter, I had some fake fur laying around on the floor. My cat, Shadow began sleeping on one of the piles every day!
She seemed to like it so much, that I decided to make it into a Kitty Bed for her. I just folded over a rectangle of the stuff, filled it with polyester from an old pillow, and sewed it up. Now she sleeps on it all the time!