Abstract: A geometric building block assembly creates three-dimensional geometric structures based on the particular orientation and location of individual building blocks. The assembly includes a plurality of building blocks. Each of the building blocks is geometrically shaped and has a plurality of planar faces. A plurality of magnets is provided. Each of the magnets is coupled to an associated one of the planar faces. Each of the magnets has an associated magnetic orientation such that the magnets on each of the building blocks are magnetically couplable to the magnets on an adjacently positioned building block only when the building blocks are properly oriented.