Let's-Read-and-Find-Out Science: How People Learned to Fly 自然科学启蒙: 人类如何飞向天空（天文）

This series of books gradually introduces basic concepts of natural science to kids through vivid pictures and simple language that satisfies kids' needs to understand the scientific world. Many of the books contain simple activities for children to do. This book mainly tells the history of human flight. There have been countless trials and failures. This book tells you how these flying dreamers overcame obstacles and finally allowed humans and aircraft to fly freely.