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Play Doh

Maybe it comes as no surprise that the smelly, gooey stuff kids have been playing with for decades was originally intended as wallpaper cleaner. In the early 20th century, however, people stopped using coal to heat their homes, which meant that their wallpaper stayed relatively clean. Luckily for Cleo McVicker, the original inventor, his son discovered another use – modeling clay.

 

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Many Inventions Have Actually Been Accidental
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