When does the foetus start to dream? What are its early dreams? What is the function of infant dreams? What is the impact of nightmares? How do dreams evolve during adolescence? Gérard Bléandonu brings to these questions his experience as a psychotherapist specialising in children suffering from psychological difficulties. The author also makes use of recent findings in neuro-physiology which have improved our understanding of dream mechanisms. Gérard Bléandonu is a psychiatrist and head of Child Psychiatry at the regional hospital of Savoie, France. He is the author of numerous works on child and adolescent psychiatry.