A simple 6mm scale factory, or a 25mm scale power unit. Thie structure was made from a plastic holder for a stamp kit my daughter received for her birthday. When inverted, it looked quite nice! I tacked it on a piece of 3/4" styrofoam, and painted the ground a tan color. Light black was used for the building, which was then washed with dark black and highlighted with a blue-gray. Detailing was easy.