Despite the abundance of children’s clothes in the collections of French Fashion, Applied Arts and Folk Museums, Children’s Fashion is not a major topic in Fashion History. Crossing a corpus of artefacts with ethnographical, historical and sociological testimonies and archives from the Fashion Industry, this research intends to analyse the relationship between the child and its clothing. Despite its abilities to talk, manipulate and desire, the child is not imbued by the habits defining social beings. Therefore, in a constant interdependence with the adult, the child’s education consists in its socialisation to bring him into history. Through the analysis of the capacity of Fashion to dress the identities, this research approaches clothing as an education tool in the hands of the adults. In parallel, as a technical handling kit, a set of sensations and an object of desire, clothing is an adoptable system by the child who dresses up itself as it wants. In order to avoid an adult focus, this study looks also at the deconstruction of this socialisation process by analysing the appropriation of fashion by children. Finally, this study of children’s clothing provides another approach to Childhood History and shows the essential contribution of the study of the Material Culture to a Childhood Sociology, source of knowledge of the mechanisms of our society.