This book is very suitable for reading to 6-year-old Mandarin-speaking kids (or 1st grader, and above) before bedtime. Several of the author's articles were selected in the textbook in Taiwan education systems, so kids usually already have basic familiarity with him. The content is about the knowledge level of adolescence and above, but it is fine for kids to have doubts while the parents are reading since these scenarios are perfect for interactions.