The life of the individual, which begins with his birth, continues with infancy, childhood and school periods. Each semester is a new adventure, a new learning. Childhood, the period in which most things are learned in life, is one of the most special periods of human life. This book has been written to provide parents, psychological counselors, psychologists, teachers, experts and trainees with a detailed examination of the child's development and problems, from the prenatal period to the end of adolescence.