Abstract: A toy construction kit particularly useful in constructing architectural models, such as structural bridges and the like. The kit includes a number of elongated members having parallel notches along their edge that are spaced apart at equal intervals or at multiples thereof. The notches are capable of receiving a notched edge or end, of another member in crosswise mating. Some of the elongated members have notched ends, also capable of engaging other members in the kit, and at least one of the elongated members is curved with all of its notches formed parallel. As all of the pieces interlock together, various structural models may be assembled and disassembled without the use of tools or any other type of hardware.