Game designer Brenda Laurel started working at Interval Research in 1992, and began to think about the differences in the way girls and boys experienced playing video games. After interviewing around 1,000 children and 500 adults, she determined that games weren't designed with girls' interests in mind. The girls she spoke with wanted more games with open worlds and characters they could interact with. Her research led to Interval Research giving Laurel's research team their own company in 1996, Purple Moon. Also in 1996, Mattel's game, "Barbie Fashion Designer", became the first best-selling game for girls. Purple Moon's first two games based on a character called Rockett, made it to the 100 best-selling games in the years they were released. In 1999, Mattel bought out Purple Moon.