Does being in love hurt? How big is an egg? And why do boys have eggs on the outside and girls on the inside? These are children's questions about sexuality that can leave adults stumbling. Sonja Blattmann succeeds in conveying age-appropriate knowledge about bodies and sexuality in a sensual way through stories and songs in her book "My First Home Was Mommy's Belly." The focus is on Sofie, who has a birthday tomorrow. She can never get enough of her parents telling her how she came into the world. She knows her first home was Mommy's belly, but how did she get in there? It sounds almost dreamy when Sonja Blattmann tells us that we were all once tiny dots. In other parts, her lively songs invite participation, such as when the body is drawn in the air. Anatomical knowledge is imparted almost incidentally. A tested and successful concept.