“A new division in playground planning,” advertisement for Creative Playthings Inc. Playsculpture Division, September 1955. In the early postwar period, “play sculpture”—abstract, often free-standing concrete structures designed by artists and architects alike—proved that modern design could make playgrounds beautiful while providing new forms for imaginative recreation; the movement generated photogenic results such as the colorful Ägget (The egg) by Danish artist Egon Møller-Nielsen.