tanagra writes "50 years ago U.S. Patent No. 3,167,440 was granted to Noah McVicker and Joseph McVicker for a "plastic modeling composition", (which was originally intended to be a wallpaper cleaner) now called Play-Doh. Little did they know that they had created the substance of childhood memories as well as many a childhood meal, unfortunately. Play-Doh persists as one of the most well known and popular children's "toys". As you attempt to clean your children's Play-Doh out of the carpet, the car, and the bathtub; take a look back with us at how it all got started."