The starting point of our article is the controversy within the scientific research in sociology of childhood regarding the question of youth voice and its consequences at the political level (Garnier & Rayna, 2016; Leroy, 2020; Lignier & Pagis, 2012, 2017). Our article proposes to show how much this voice, if it is actually collected, listened to and analyzed, can quite: on the one hand, reveal the capacities and skills of ordinary or vulnerable children and adolescents to analyze their own lives and experiences, contributing to their well-being and success; on the other hand, enrich the understanding of certain explanatory elements of the phenomena studied and bring out other elements that are not at the center of researchers’ concerns; finally, bring out improvement directions for actions or schemes created and implemented for children and adolescents.