This is a totally fun idea. I purchased some transfer numbers (like what they sell from Upper Case Living) and put them on all our bedroom doors. My son couldn't figure out why in the world I would do such a bazzare thing! I told him I was starting to charge rent and room #2 (his room) was going to be charged the highest rent. LOL. He didn't like that idea. This would also be fabulous with vintage architectual numbers! Each one different!!