Ever wondered what your parents and grandparents played with when they were kids?
You have World War II to thank for Silly Putty. Scientists feared a rubber shortage, so they began trying to create a replacement. It didn't exactly work out the way they wanted, but a toy store owner got her hands on some, and together with a marketing consultant, they began putting bits of it in plastic eggs and selling it. Within 3 days, they had 250,000 orders, and by the 1950s, it became all the rage.