Why Just a Board Book?

Hey, George! a new book by Sandra Boynton is so cute and clever, but it only comes as a board book.  Why??  I would love to share this story in preschool storytime, but as a board book it's just too small to read.  And I think preschool children would get a kick out of George's secret. 

Here, George!

by Sandra Boyton; illustrated by George Booth

Maybe I'll have to ask a coworker to make me a flannel based on the book!