Play-Doh - Definition and Overview

Play-Doh is a moldable substance similar in texture to bread dough that has been sold as a children's toy around the world for a half century. Its exact makeup is a secret, but the company Web site says "it is primarily a mixture of water, salt and flour" - which are the ingredients of dough.

Play-Doh was invented by Noah McVicker and Joseph McVicker in 1956 and awarded U.S. Patent 3,167,440 in 1965. It is one of many common products invented by accident: It was meant as a wallpaper cleaner.

Play-Doh comes in different colors and has a distinctive smell. Over 700 million pounds have been sold so far -- roughly enough to span the Earth's circumference three times. The product is now owned by American toy giant Hasbro.

External link

• Who Invented Play-Doh (http://inventors.about.com/library/inventors/blplaydoh.htm)
• US Patent Number US3167440 (http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=US3167440&F=0)

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