This invention generally relates to a set of parallelepipedal bodies (cubes) capable of matingly compatible engagement for interconnection with substantially similar cubes or matingly conformed rails, so as to allow up to three degrees of freedom in the sliding movement of an individual cube or grouping of cubes about a grouping of other interconnected cells from the set. Each cube is constructed from six plates with an interior physical configuration adapted for connection and that lends itself to monolithic injection molding. The exterior physical configuration of all plates are substantially similar. When a number of cubes are assembled into a cubic array, there can be slab movement, row movement or solo cube movement.