Abstract: A system of units for constructing or replicating a means (10,10,10p) including means of diverse materials consisting of a plurality of pieces (20,22,23, 156-165) having at least one indicia (18) thereon for detection thereof, at least one adjoining means functioning according to instructions of a computer program of a processor means for adjoining in any predetermined relation with other of the plurality of the pieces (20, 22, 23, 156-165), and the processor means (30, 120, 166, 167) having the computer program instructions being responsive to detection of the at least one indicia to provide for arranging the other of the plurality of the pieces in the predetermined relation for controlling the fabrication means in assembling a given number of the plurality of the pieces in the predetermined relation to comprise a produced fabrication means (10,10,10p) are selected from a group consisting of a puzzle piece system, a construction system, a hot knife system, a holed piece system.