Ruth Handler Club children's television show, Mattel invested heavily in television advertising. The TV commercials for the Barbie doll paid off and Barbie rocketed Mattel and the Handlers to fame and fortune. Subsequently, they would add a boyfriend for Barbie named Ken, after the Handlers' son, and many other "friends and family" to Barbie's world. Handler was diagnosed with breast cancer in 1970. She had a modified radical mastectomy, which was often used at the time to combat the disease, and because of difficulties in finding a good breast prosthesis, she decided to make her own. Handler went on to found a
Oxford (toy company) themed sets from Disney, Hello Kitty, Robocar Poli and Pororo. Oxford manufactures Kre-O bricks on behalf of Hasbro. Oxford sets are commonly copied by Chinese toy companies Sluban and Woma, sometimes with slight changes. The company produces small block sets in several themes including: Oxford (toy company) Oxford Co., Ltd. () is a South Korean toy company, based in Busan, that makes interlocking brick toys. The company was first founded in 1961 as Dongjin Ind. Corp. In 1971, toy sales company Daegoo Lucky toy corp was established. In 1972, toy sales company Busan Lucky toy corp was established. In 1984,