Abstract: A kit is provided for constructing model buildings. The kit includes modular blocks, which are interlocked to form a roof and structral walls corresponding to the outer shell of the building, and also includes construction brackets which are abutted in side-by-side alignment at the top edge of a structural wall to form a supporting ledge. Such ledges are used to form setbacks and overhangs in the building structure and for supporting the roof. Each bracket includes a generally horizontal main wall with bounding inner and outer edges and two lateral edges each extending between the inner and outer edges. At each of the inner and outer edges, the bracket is provided with lower and upper connectors. The lower connector is designed to secure the bracket to the top edge of a structural wall disposed below the bracket, and the upper connector is designed to secure the lower edge of a structural wall disposed above the bracket.