This 1974 flyer for a “Planning for Play” workshop held at Marks Meadow Elementary School on the University of Massachusetts, Amherst campus promoted the use of recycled materials in environments where children play and learn. “So I invented this whole thing,” Ostroff recalled in 2000, “of fixing the environments using recycled materials. We could make toys out of recycled materials and it wouldn’t cost any money. I became known as this person who did things with space” (AC1356-0000010). Courtesy of Archives Center, National Museum of American History