Which is a very fancy way of saying "Pop-up Book". Chalk it up to a pop-up deprived childhood if you'd like but I'm a grown woman who loves pop up books. I've also had life long fascination with Da Vinci because he was a genius artistically and scientifically, putting him in a class of his own. So, a Da Vinci pop-up book? Yes, please! I heard about this one years ago and have been on the lookout for it ever since. I lucked out and it arrived earlier this week and I can't stop looking at it. I finally read all 12 pages today; the writing is skewed towards 10 year olds, if I had to guess, but who cares? It's beautiful! It pops up!