Honestly, nothing is more rewarding or motivating for a children's author than receiving letters from teachers like this one:
A bigger thanks for writing books [my students] want to devour! They can see themselves and their friends in the characters you create. This is HUGE for them....
Most of them are reluctant readers when they first come to me. We work hard all year to find books they will love. Your books are my "go-tos" and can always, always, always hook them. Owen, Viola, Travis, Stumpy, Elvis, Popeye, Aggie. My students get them and fall in love with them.
Thank you to the teacher who sent me that. Now I'm ready to get back to writing more books.