"Everything I Know About Lean I Learned in First Grade"

"Everything I Know About Lean I Learned in First Grade" by Robert Martichenko http://www.amazon.com/Everything-About-Learned-First-Grade
is a wonderful book to read. I would recommend it to anyone interested in understand more about Lean, without getting too deep into the weeds.
It is based on the author's visit to the his daughter's first grade class .. on her first day of school.
It is a small book, I think not more than 100 pages, but I have devoured it in just 3 hours. I am thinking to give it away to my son's second grade teachers as a present ... they are doing/being Lean and they do not even know it.