I love how instead of flat out telling them "no", their parents decide to let them learn a lesson. I really appreciated that. As a parent, it's nice to read a book where parents encourage their children to learn, instead of just saying "yes" or "no". I also loved how Pauline and John-John changed their selling strategy throughout the book. What a fantastic lesson to not only children, but adults reading the book as well.
My family and I really enjoyed this book. The book would be a great addition to any family library or classroom library.