"The Child's Conception of the World" is a groundbreaking work in child psychology that examines the differences in the thought processes of children and adults. The author, Jean Piaget, analyzes how children shape their understanding of the world during various developmental stages. Central questions addressed include the distinction between the external world and internal, subjective perception, as well as the boundaries between the self and objective reality. Another focus is on the significance of the explanations children provide and how they understand causality and regularities. Jacques Voneche, director of the Piaget Archives in Geneva, offers context to Piaget's work and the development of developmental psychology in his foreword. This book is an essential contribution to understanding children's perception and thinking.