This illustrated book describes the story of Per and Ida, who will have a sibling. Every form of coexistence is challenging, and all families have their "black" days when fatigue or anger takes over. It describes various emotional expressions such as anger, joy, jealousy, solidarity, hoping that both adults and children will understand that all kinds of emotions must be expressed. The purpose of the book is to feel that sexuality is a natural and positive aspect of our lives. It serves as a gift to parents, a starting point for dialogue with children about sexual education. The child needs to know their body in a natural and guilt-free way in order to avoid psychologically traumatic experiences. The realism with which the authors describe the construction of each gender's body and the beginning of human existence will free the child from inhibitions. Through the pages of the book, the child will discover their body and prepare for a proper parental role and a balanced interpersonal relationship.