CORSI, B. R. Early Childhood education conflict: what children have to say about them? São Paulo, 2010 (Master essay). Nowadays the idea that children are people able to build, to transform, to produce and reproduce cultures is legitimated (CORSARO, 1997, SARMENTO, 1997, 2007). Following this line, a research with a children's group, around 5 and 6 years old from a public institution in São Paulo was realize, in order to investigate what they think and say about the disagreement they deal with. The research used children´s oral narrative about what they said of disagreement, which was noted by the researcher and a methodology suggested by them: the Conflict Box-place where they spontaneously deposited situations registers that they judge conflicts. The conflicts noted by the children was analyzed using the Wallonian theory, in which are understood as a constitutive movement through self preservation and affirmation, therefore, necessary reality to the psyche and social children´s life formation. We used, also, papers published by Manuela Ferreira and William Corsaro that refers to researches realized on children´s relationships, in other words, about children's interaction. From the collected material it is possible to say that conflict for these children, unlike adults' interpretation, it is not only something that physically hurts someone else, or the disrespect to a rule, but also something that makes them sad, frustrated, scared, in other words, situations that evolves emotions, something they describe as the most conflicting.