This is the easy and funny learning book to deliver the principles of natural science and engineering in the traditional dyeing craft by storytelling.By the advice of grandfather, the hero JunYi met the scientist and learned the scientific principles in traditional natural dyeing craft, the wisdom and charms of our ancestors reflected in them.This book is designed so that children may understand the basic concepts of the traditional dyeing craft and scientific principles, putting the adventure story which the hero solves the problem through the knowledge related to the traditional dyeing craft, stimulating curiosity and imagination. This book introduced natural pigment, refinery process, starching process, mordant and function of mordant to children, so they will be able to learn scientific knowledge and wisdom of our ancestors, hidden in materials and methods of dyeing craft.