Okay, so, this is totally a cop out post, but in keeping with my Harry Potter theme I made an invisibility cloak. I promise, I'll work on an actual room soon.
I used thin silver fabric and just cut a giant square and folded it up. Okay. Not really art. But with a little note that says 'use it well' it'll make a good little addition for the dollhouse, for people who know what to look for.