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Post it Notes — MISTAKE! A scientist was trying to make a super strong glue, but accidentally created one that could easily peel off and stick again. That eventually became Post it Notes!
Chocolate Chip Cookies — MISTAKE! Ruth Wakefield added pieces of chocolate to her cookie mixture, expecting them to melt. They didn’t! Instead, she ended up creating chocolate chip cookies.
Play Doh — MISTAKE! Play Doh was originally created as a wallpaper cleaner. It was later discovered that the soft material was much more fun to play and create with.
Crisps — MISTAKE! A chef sliced potatoes really thinly after a customer complained that his potatoes were too thick. The customer loved them, and crisps were born!
So... all four were unexpected discoveries!
