Abstract: A system for constructing a variety of organic forms including an elongated flexible sheet repeatedly 180.degree. bendable about multiple crossing and spaced axes running through the sheet and with a longitudinal axis of symmetry and similar reentrants along edges of the sheet symmetrically arranged on two sides of the axis, fastening pairs with elements of each pair arranged symmetrically on opposite sides of the axis and further constructed in staggered form for transverse axis symmetry reassignment of fastener element pairs, the fastening elements being constructed and arranged for pair assignment and fastening in multiple combinations to define different organic forms, and the sheet being sufficiently stiff to produce in at least one of the organic form fastened together configurations, a self-supporting shape.