I adapted a few patterns for a camper van . Basically, I made a long rectangle in the granite stitch, folded it in half and formed it into an igloo shaped or a half circle. I slipped in cardboard to keep the floor rigid and the doom sturdy.
I used two rectangular pieces sewn together for the back, leaving the top semicircle open to create a window.
The base of the sleeping platform is a plastic grid.
I think i will make an open box under the bed to store the mouse clothes.
rideas see http://www.diyhowto.org/crochet-caravan/
The mouse is not quite finished and I will post it in a few days.