Hard red plastic wall panels with studs top and bottom which connect together by means of softer white plastic beams with holes. Flat green panels wiht studs at the corners form the roof. Wall panels come in a variety of designs, including different windows and doors. Green balconies clip onto windows. The parts are essentially the same as those in Architects Construction Set, Constructo Plastic Building Set and Der Kleine Grosseblock Baumeister, albeit in different colours and slightly different panel designs.