Mattel’s Barbie is over 50 years old-but we’re not just talking basic Barbie anymore. Barbie has changed. Her arms and legs are bendable, and her hair is any number of lengths and colors. She has a dizzying array of outfits and accessories. Each version requires different materials and setups. In addition, Barbie has lots of friends-each with different production requirements. In 2008, Barbie, her friends, and various vehicles, houses, and so on brought in over $1.2 billion in revenue for Mattel. With each decade’s new cohort of little girls, Barbie and friends may be in the maturity phase for quite some time to come.