I made a cozy that looks like a sleeping bag to add to the 'camping' theme in my cage.

The outside is a fishing/canoeing/forest print, and it is lined with a very plush purple corduroy. The pillow is the forest print as well. I quilted around the bag to give it more of an authentic sleeping bag look. It is sitting on a cutting mat with 1x1 inch squares, so you can see hoe big it is.

I have step-by-step photos of making it, that I'll upload to my photobucket, and post a link as comment.