主权项 |
1. A stackable block comprising:
a body having six sides including parallel opposing front and back sides, parallel opposing left and right sides, and parallel opposing top and bottom sides; at least one projection projecting from at least one of said sides, said projection having an face and four sidewalls so that said projection has a square cross-section, said projection's face includes an edge which extends uniformly beyond all four of the projection's four sidewalls to form a recess between said edge and said adjacent block side so that recess is formed into all four sidewalls; at least one slot having a length and a width and wherein said slot is formed into one of said body's sides, said slot's length extending the entirety of said body's side to form a cavity that extends from one side of said body to an opposing side of said body, said slot also including opposed flanges that extend over the cavity with the distance between said flanges defining said slot's width, said slot being rectangular wherein said slot's length is greater than said slot's width; and said slot's width sized to receive a projection of other like stackable blocks in two different press-fit attachment positions wherein said projection and said slot are sized and configured so that said projection can affix to a slot of other like stackable blocks in a first attachment position, and so that said projection can affix to a slot of other like stackable blocks in a second attachment position wherein said projection is rotated 90° as compared to the first position, and wherein said projection's square edge and said slot's flanges being sized so as prevent said projection from disengaging from a slot of other like stackable blocks when affixed in either the first or second attachment positions. |