This can originally contained Play-Doh, the soft, molding compound used by kids everywhere since the middle of the 20th century. Play-Doh originated as a variant of a cleaning compound used to improve the look of wallpaper. Joe Vickers of Kutol Chemicals in Cincinnati sent the compound to his sister-in-law who had complained that her students could not manipulate the modeling clay supplied by her school. Vickers sold white Play-Doh to the Cincinnati school system and placed the compound in major department stores throughout the country. By the mid-1950s, Play-Doh came in red, blue, and yellow, and nearly every playroom in America had a supply of the substance.