Description: An early childhood sex education picture book series featuring Gu Sung-ae and Pororo. The basic concepts of sex education are explained in a way that's easy for young children to understand. For parts that are difficult to grasp from the story alone, detailed explanations from Pororo's friends have been added. "Soft and Wrinkly, My Belly Button" tells the story of how life is conceived. The book includes interactive play pages where children and parents can use stickers to review what they've learned together, as well as information pages with explanations from teacher Gu Sung-ae, allowing parents and children to learn side by side. The secret of the soft, wrinkly belly button! Children will discover that the belly button is a mark of love connecting them to their mother. Through this book, children will come to realize just how deeply loved they are. Gu Sung-ae, the foremost authority on sex education, has teamed up with Pororo, the beloved 'president' of children everywhere! Olive M&B's flagship publication, the "Gu Sung-ae Sex Education Series," has been a steady bestseller since 2006, with over 250,000 copies sold. Drawing on years of publishing experience in elementary, middle, and high school educational content as well as adult content, Olive M&B has now created early childhood sex education content in picture book form. With the addition of Pororo, beloved by children around the world, a wonderful new picture book has been born—one that children can enjoy more easily and happily. This sex education picture book, featuring the renowned Gu Sung-ae and the beloved children's icon Pororo, will serve as an opportunity to explain basic knowledge about sex to young children in a friendly and accessible way. Furthermore, it will help lay the groundwork for preventing child sexual abuse—a serious social issue in recent times—and will help instill correct values and knowledge about sex in young children. Basic content related to sex has been explained in a way that meets children at their own level of understanding. The days of teaching difficult sex education content through rote memorization should be over. This book is based on a variety of real counseling cases encountered at Blue Awoosong (Pureun Aoseong), presenting the questions children have and the essential knowledge they need in story form. As children read through the picture book, they will come to understand their own bodies and realize just how precious their own life is. An easy and fun sex education time with Pororo! For parts that cannot be fully understood from the story alone, detailed explanations from Pororo's friends have been added. Don't worry if your child suddenly asks a question while reading—detailed and easy-to-understand explanation guides are included throughout the book. Various play pages that children can actively participate in, along with rich information pages! Education isn't complete just by reading a single book. The play pages, where children and parents use stickers to review what they've learned together, and the information pages featuring explanations from teacher Gu Sung-ae, will allow parents and children to study together. When it comes to sex education, the best teacher is a parent. After reading this book, try using the enriching follow-up activity pages together with your child. Your child will build a solid and valuable foundation in sex education, guided by the wisest teacher of all—you.