I found the picture of beautiful haunted houses on Pinterest and loved it immediately. The picture was pinned from Boxwood Clippings blog. I've read DIY Spooky Halloween Houses posting and immediately went to order Paper Mache House set from Hobby Lobby.
I painted them in matte acrylic craft paint, glued some tracing paper inside windows. I have a perfect piece of furniture for them - each shelf smaller than the previous one. I wanted the light inside to be orange or yellow so I used orange Halloween lights. It was one string, plugged in on the bottom, then pushed through shelves up and put in sections inside every house.
These houses are like boxes with roofs as lids. If you put something inside that goes back outside the lids wouldn't close. So I took x-acto knife and cut slits on the back of the houses. The wires went trough these slits and the lids closed properly. My little Japanese salt and pepper shakers played ghosts perfectly:)