Two double sided announcement cards connected by intersected opposing slits which allow it to open up to become a three dimensional graphic published in conjunction with show held July - September, 1968. Artists include Josef Albers, Max Bill, Alexander Calder, Julio Le Parc, Jean Tinguely, Nicolas Schoffer, Jesus Rafael Soto, Victor Vasarely, George Rickey, Heinz Mack, Richard Paul Lohse, and Yaacov Agam.