Silver Clouds Created for a 1966 exhibition at the Leo Castelli Gallery, Warhol created an environment that included one room filled with Silver Clouds, helium-filled balloons which moved with the air currents. In addition to creating an ethereal, joyful atmosphere, they challenged traditional expectations by mingling with and touching the viewer. Made of helium and oxygen-filled metalized plastic film, the Silver Clouds were created with the assistance of Billy Klüver, an engineer and one of a group who sought to bring together artists and new technology. After seeing the Silver Clouds, choreographer Merce Cunningham was inspired to include the work in a new dance piece, RainForest, which premiered in 1968 and included choreography by Cunningham, music by David Tudor, set by Warhol, and costumes by Jasper Johns. http://www.warhol.org/default.asp