Abstract: New and useful sign structure is provided, that is designed to be (i) efficient and cost effective to produce, (ii) easily and efficiently assembled, in order to change the message conveyed by the sign structure, and (iii) effectively rotated by the air movement in the vicinity of the sign structure. The sign structure comprises a support rod, and a sign comprising a specially formed panel that is rotatable on the support rod. A bearing surface is integrally connected with the panel (preferably formed in one piece with the panel) and extends along a predetermined portion of the panel. The bearing surface is configured to slide over the support rod and to rotate on the support rod, so that the panel is rotatable about the support rod. In a preferred form, the panel comprises a synthetic material having a corrugated configuration with at least one corrugation forming the bearing surface for the panel.

Abstract: A corrugated panel, which is made out of cardboard, plastic or other corrugated material. On two opposite sides there are three pieces of hook and loop material. This material is in alternating order and is equally spaced, one at the top (hook), one in the middle (loop) and one on the bottom (hook). The hook and loop material on the opposite side are equally spaced, one at the top (loop), one in the middle (hook) and one on the bottom (loop). This alternating sequence allows the panels to be joined, creating rooms and hallways. Panels can be placed on the top to form a roof for a temporary play structure.