Before it became the beloved children’s toy it is today, for 22 years Play-Doh was a wallpaper cleaner. In 1954 American Joe McVicker was working for Kutol, the company producing the dough-like substance when his sister-in-law approached him with an idea. She had taken some of the non-toxic cleaner to the nursery where she worked. The kids went wild and McVicker immediately saw a commercial opportunity. He added colorants and gave the dough a pleasant almond scent.