1. It's hilarious.
2. The sixth-graders in the book talk like real sixth-graders. (See #1.)
3. Origami Yoda is a super-fun read-aloud. (See #1.)
From my son, a soon-to-be sixth grader:
4. The straw holes in a hamburger thing.
5. The pee stain chapter.
6. The "fools rush in do" part.
The card-catalogue-description basics: "Sixth-grader Tommy and his friends describe their interactions with a paper finger puppet of Yoda, worn by their weird classmate Dwight, as they try to figure out whether or not the puppet can really predict the future. Includes instructions for making Origami Yoda."
Angleberger, Tom. The Strange Case of Origami Yoda. Amulet Books/Abrams, 2010.
A sequel is on the way in 2011. Which is awesome.