What kind of exchanges during pregnancy, what kind of sensory polyphony during the first months of a baby's life, how does he access the game of surprise and humor in his first dialogues, what kind of playful situations to experience with him in the perspective of a sustainable world: these are all questions that arise as much for parents as for educators and teachers in initial school. Acting and interacting with children from birth requires being welcoming and framing. How can we provide a flexible and protective framework for children to develop their natural curiosity and accompany them on their path of discovery in a caring and structuring manner? This is a great opportunity to take into account the proximal zones of development in order to act and interact in a constructivist manner in all areas of human development. Nurturing their affective, relational and cognitive capacities at the same time, supporting their creativity and their skills, fermenting their curiosity and their motivation to act and interact with their environments: the child can thus promote his capacity to be in his own right. Partner always, victim or executioner, never!