I saw the sweater bed somewhere on here too, but can't remember where. I make mine from pillow cases and those foam, egg carton mattress pads you can buy at Walmart. Just cut the pads to fit the pillow case, decorate the case as desired (or make one from your stash!
) and push the pad in. I love it because it is so easy, so inexpensive, dogs love them and you have a nice, washable cover.