Such a sweet tradition

Today in a plain brown envelope a mom sent me a copy of Dr. Seuss' book, Oh, the Places You'll Go.  She asked if I would please write a note to her son about his kindergarten year.  When I opened the book, his preschool teachers had already signed the book and the mom's note explained, that it was her intention to send the book to each of his teachers at the end of the year secretively, and then to present him with the book at his high school graduation!  Is that not the sweetest tradition ever?!!