These may give you some ideas on what to do with each of the rooms:
My bathroom is not finished yet, though I wanted to show how well all of the 'faded from pink to peach color works well together, the sink is Arco with a working sprayer nozzle. I just need to glue the blue shower head back on the yellow tub hose. The tall free standing mirror is a generic one from china that is built like a gloria piece. I bought two, one came in (dull) gold and this white one. the scale is great, and it matches the 70s style gloria rocking chair that I painted yellow and brown and usually keep in the house. I did make a wire basket hanging chair I will post pictures of later when I install it.
The Philippe Starck ghost chairs work really well with these houses.
Entrance and patio ideas for the house are limitless. I also prefer the red lanterns for the big house.