Abstract: Apparatus for interconnecting a plurality of articles includes a connecting member having a circular walled periphery, a portion of which is selectively engaged by at least one arcuate slotted portion provided on each of the articles to provide interconnection therebetween. The arcuate slot matches the curvature and thickness of the connecting member. According to the invention, a plurality of connecting members can interconnect a variable number of articles to create expandable planar arrangements which can also be secured to a mounting surface, such as a wall or table-top. In a preferable embodiment, the articles and connecting members can also be stacked one upon another to form an expandable vertical arrangement.