I get hundreds of these every year. Let me translate if you're having trouble reading the note:
Dear Mr. Hartman,
Thank you for coming to our school today. I loved the chicken and the watermelon story. I also liked the rest of them. I hope you can come again.
For 20 years people have been stopping me in all kinds of places, both adults and children, and asking me to do the 'Chicken and the Watermelon'. You don't know what that is? You'll have to book me and find out!