The purpose of this article is to review the way in which subjectivity is constructed in childhood and the way in which knowledge is constructed at this age. For this, I intend to develop my working hypothesis in four sections. In the first, I will review the phenomenon of childhood in the light of Simondon's theory and, in what way it can be conceived as a form of biological individuation beginning in the body constituted as the first medium, taking into account other central concepts in the author. In the second section I will refer to the family and the transformation that the infant, now a boy or a girl, presents from her encounter with the school. For this, I will describe case studies and contrast them with what is stated in the first section In the third chapter, the previous analyzes will be integrated, from the magnifying glass of the concept of invention proposed by Simondon and its relationship with the game as a didactic strategy that enables the construction and perception of reality. Finally, I will present some conclusions.
