The Boy Who Changed the World has a great series of stories about men who changed the world. I did find that my 4 year old had trouble following the stories. There are quite a few and after a while, she was getting confused as to which boy was which. Also, some of the wording seemed a bit difficult for a child between 4 and 8 (as is indicated is the target age for this book). Might be good reading for 8+ yrs old. Overall, great moral of the stories. Great encouragement for kids to follow their hearts and work to change the world themselves.