Abstract: A polygonally shaped panel or fabrication device having a depending curled locking means formed at at least one edge of the panel is disclosed herein. The locking means is contiguous to and substantially co-extensive with the edge associated therewith. The curled locking means may include a plurality of apertures randomly distributed about the circumference thereof. A plurality of the present panels are deployed to form an interlocking and interconnecting system in a free form array which can be used as a toy construction, as a display system and, preferably, in the fabrication of modular structures.