Patent attributes
A construction toy system including a plurality of modular assembly pieces and a plurality of pivotal-rods. Each of the pivotal-rods includes an identical engaging rod-tips on each end thereof. Each of the assembly pieces have identical thickness and a circumferential edge. A number of straight receiving grooves are formed, inwardly, at the circumferential edge, wherein the identical thickness is predesigned to fittingly fill the gap formed by the straight receiving groove. A select assembly piece is configured to interlock with another assembly piece via the straight receiving grooves of both selected assembly pieces. A selected assembly pieces may have at least one identical circular through hole formed at a central location with respect to the lateral dimension of the assembly pieces, wherein an engaging rod-tip of a selected pivotal-rod may engage with a selected circular through hole of the selected assembly piece.