Recognize the importance of teamwork with the car at work! Preschool babies are not yet able to understand some abstract concepts, such as cooperation. The author uses transportation as the theme to create abstract concepts and turn them into images that are easy for children to understand. In the book, these common means of transportation in engineering have completed the work through mutual assistance and cooperation. Repeated questions and answers, exclamations, and images of cars doing their jobs throughout the book reinforce the meaning of "cooperation", allowing abstract concepts to take shape in the minds of babies. This book allows children to learn from reading, enjoy the book more, and say happily together with the means of transportation.