This paper analyzes children’s physical and sports practices in various social backgrounds. From interviews with thirty families, the objective consists in studying the role of the body in the social differentiation of children. More particularly, the paper analyses the parents of the middle and upper classes. The data allow to distinguish two groups that express conceptions of the body, childhood and the relatively antagonistic education. Generally, the “technocrat” and “technician” families of the first group value the surpassing of oneself and the realization of performance. The “mediator” and “intellectual” families of the second group favor the psychomotor development of children in non?competitive activities. The latter group, however, includes three “technocrat” families that differ from those of the first group by their proximity to legitimate culture. Thus, parents’ strategies for physical activity and sports refer as much to the social position of the families as to their lifestyle and cultural practices.