Beautiful stuff. This is called “Articulated Cloud” and this video of it in motion is must see.
Articulated Cloud – Pittsburgh Children’s Museum, Pittsburgh, PA. 2004
Composed of thousands of translucent, white plastic squares that move in the wind, the artwork is intended to suggest that the building has been enveloped by a digitized cloud. The optical qualities of the skin change dramatically with the weather and the time of day. The articulated skin is supported by an aluminum space frame so it appears to float in front of the building. The design evolved through a collaboration with the architects, Koning / Eizenberg.