51 years ago, Barbie was introduced at the American Toy Fair
March 9, 1959: 1st Barbie Doll was Displayed at the American Toy Fair in New York City. According to Wikipedia: It is estimated that over a billion Barbie dolls have been sold worldwide in over 150 countries, with Mattel claiming that three Barbie dolls are sold every second.
Happy Birthday, Barbie!