This book provides an in-depth view of the most important stages of children's development from their first moments. It explains the most important features of their psychological, mental, sensory, and moral development. It also discusses the effects of environmental, educational, and pedagogical factors on shaping their psychology and awareness. This book is an indispensable reference for everyone who seeks to understand the world of childhood, whether they are parents, teachers, or specialists in educational psychology, as it provides the correct scientific foundations and methods that help build a psychologically and mentally healthy generation.