Patent ID: 8382548

Claim:
A toy building block set comprising: a first block and a second block removably attachable to said first block, each of said first and second blocks being a rectilinear polyhedron and including: a top wall; a plurality of side walls extending orthogonally away from said top wall to a bottom end, each of said plurality of side walls having an interior surface generally facing a geometric center of said block and an opposing exterior surface parallel to the interior surface of the side wall; at least one connector extending generally orthogonally away from said top wall, said at least one connector including a plurality of partitions each having an interior surface generally facing the geometric center of said block and an opposing exterior surface parallel to the interior surface of the partition, at least one of said plurality of partitions extending generally parallel to and spaced a predetermined distance away from one of said plurality of side walls; a projection extending orthogonally away from said interior surface of at least one of said side walls proximal said bottom end or said exterior surface of one of said plurality of partitions; and a depression formed within said exterior surface of at least one of said plurality of partitions or within said interior surface of one of said plurality of side walls proximal said bottom end such that said one of said side walls bears either said projection or said depression proximal said bottom end and said one of said partitions bears a remaining one of said projection or said depression with said depression of said first block being located, sized and shaped to receive said projection of said second block so as to releasably join said first and second blocks; wherein each of said first and second blocks further comprise at least three spaced-apart connectors, at least one of said plurality of partitions of each connector includes a depression in said exterior surface thereof; and wherein each partition includes a first free end and a second end fixedly attached to said top wall and wherein only a first portion of said depression in at least one of the partitions of an outermost one of said at least three spaced-apart connectors is entirely spaced away from the first free end, beginning a non-zero distance away from the first free end and terminating at a position farther from the free end and more proximal to the top wall and a second remaining portion of such depression extends along side of the first portion from the position more proximal to the top wall to and through said first free end of said partition.