This book is absolutely amazing. It is interesting, informative, well-written, gorgeously illustrated and entertaining. While it is true that this book may be a bit difficult for the average child at the lower end of the age range it is directed to, it is perfect for older children and the more talented younger children. Ms. Herbert's true genius, however, is in producing a book that adults can learn from and enjoy while they are assisting their children with the activities set out in the book -- or even if they don't have or work with children. After getting this book, I also got Ms. Herbert's next two books -- "The Civil War for Kids" and "Lewis and Clark for Kids" -- which are also wonderful. Get them all!