 Mattel became the first year-round sponsor of the "Mickey Mouse Club" TV series in 1955.The Barbie doll debuted in 1959, becoming the company's best-selling toy in history.In 1960, Mattel introduced Chatty Cathy, a talking doll revolutionizing the toy industry, which led to pull-string talking dolls and toys flooding the market throughout the 1960s and 1970s.