1 On the one hand, I think the topics in this book cover a wide range and there are many pictures. First, it is helpful to widen the horizon and second, it develops the students' interest. As it is said, interest is the best teacher. The book much develops the students' interest in English so that they will not only treat it seriously but also enjoy the book.
2 But on the other hand, there appear some difficult vocabulary in the book. So I think it better to lower the difficulty and step by step, the students can learn with confidence all the time and leave clear footprints on their path to study.