Implemented more or less voluntarily by anthropologists, the issue of ethics in ethnographic studies is considered here from four different fieldwork sites. These fieldwork sites represent different analytical scenarios in which children and ethics are initially involved. Each ethnographic scenario ("complicit", "interventionist", "wait-and-see", "participative") fits into a different epistemological stance. After discussing these scenarios and the related postures, the singular oruniversal dimensions of ethics will be debated, such as their consequences for research. The more general problem of ethics in anthropology will finally be tackled.