I consider Andy Warhol a great artist. Some say that his life parallels that of Rembrandt. When I worked with Andy, he wanted to make clouds. Andy bought as many books on the subject as he could find. To make his clouds float, I looked for a material that was impermeable to helium. The best I could dig up was something called ScotchPak from 3M that was used by the U.S. Army to pack sandwiches. The material could easily be heat-sealed, so that Andy could represent any cloud formations he wanted.

One day I walked into the studio, and he had simply folded the material into a pillow shape and sealed it. Andy's R MDUL "Silver Clouds R MDNM" now occupy a room in his museum in Pittsburgh. Friends tell me this is the most popular room with children.

--Billy Klüver