The parts are all painted metal and the buildings produced are essentially collections of cubes. Here each main part is square and is either a wall or roof/floor section. The wall parts are either plain or incorporate various perforated windows or doors. The parts connect together by means of tabs which project at right-angles from the top and bottom of the wall pieces and slip into the edges of the roof/floor parts. These latter parts are formed from two flattened interlinked loops of thin sheet which allow them to have a full width slot on all sides. Balconies and lengths of roof edging are also attached with tabs. Roof/floor sections are connected together by means of connector plates which slide into both parts, essentially acting as a double ended tab.