The best morals kids get from any book is just the capacity to empathize with other people, to care about the characters and their feelings. So you don't have to write a preachy book to do that. You just have to make it a fun book with characters they care about, and they will become better people as a result.
Louis SacharNot counting Small Steps, I think Holes is my best book, in terms of plot, and setting, and the way the story revealed itself. It hasn’t changed my life, other than that I have more money than I did before I wrote it. I’m still too close to Small Steps to compare it to Holes.
Louis Sachar