A fun and friendly look at how babies grow - from conception to birth, by best-selling author Robie H Harris. A fun and friendly look at how babies grow - from conception to birth, by best-selling author Robie H Harris. Gus and Nellie have had some exciting news: there's going to be a new baby in their family! Join them through the seasons as they watch their mother's pregnancy with fascination and curiosity. With charming informative words and pictures, here is the ideal book to help young children understand the way a baby develops inside a woman's body, and how it is born. Most of all, this book will reassure children that a new arrival in the family is an amazing and wonderful thing!