A doll called Skipper, designed to be a “sister” to the more famous Barbie doll, was a moving anatomy lesson to some of the children and adults who played with it. The doll’s most salient feature: when you lift Skipper’s arm, Skipper grows taller, and grows breasts. This video shows that process:
Skipper gets a scholarly analysis — as does her less developmentally-gifted sister — in the study “CHAPTER FOURTEEN: Girl-Doll: Barbie as Puberty Manual,” Catherine Driscoll, Counterpoints, vol. 245, Seven Going on Seventeen: Tween Studies in the Culture of Girlhood (2005), pp. 224-241. Here’s the beginning of that treatise:
Catherine Driscoll is Professor of Gender and Cultural Studies at the University of Sydney, Australia.