when was play-doh invented
It is non-toxic, non-staining, and is soluble in soapy water. When kept in a sealed container, Play-Doh remains pliable, but when exposed to air it hardens in about a day, making it good for children's craft projects. Play-Doh was invented by Noah McVicker and Joseph McVicker in 1956 and awarded U.S. Patent 3,167,440 in 1965. One of many common products invented by accident; it was meant as a wallpaper cleaner.