The document summarizes the history and fun facts of Play-Doh. In 1955, a teacher asked Joseph McVicker about a safe modeling clay substitute, and he sent her a non-toxic wallpaper cleaning compound, which became a hit. The McVicker brothers then formed Rainbow Crafts Co. to produce and sell Play-Doh. Over the decades, various companies like Kenner Products and Hasbro acquired Play-Doh. Today, over 2 billion cans have been sold worldwide since 1956, and Play-Doh remains a top-selling reusable modeling compound.