Measure the inside grove lengths and cut walls from 1/4 inch stock, such as paneling, plywood, foamcore, pressboard, etc.

Slide the walls into the groves in the frame as shown in Pictures 7 and 8.

Picture 7.

Picture 8.

Picture 9 shows three walls in place.

Picture 9.

Add flooring. Cut a piece to 2 foot by 2 foot. Use pressboard or any other firm wood. See Picture 10.

Picture 10.

Pictures 11 and 12 show the room box with 1:6 scale dolls and furnishings. The right wall has been left open for to show ease of removal for taking photos. The front wall is out for these pictures.

Picture 11.

Picture 12.

As shown in the previous picture, the outside groove is ready for a second wall if the front and back frame pieces are joined to additional front and back pieces. This makes the frame modular so any number of them can be joined for larger rooms or adjoining rooms.