Fiona Finkelstein Meets Her Match (Aladdin, 2010) by Shawn K. Stout is one of those laugh out loud books. This fourth grader is an interesting character. Fiona doesn't like "food that lies" and she's too old for a babysitter, so has a "watcher" instead. She's pretty happy in her world except that her teacher won't choose her to be "electrician." But then . . . a new kid comes to town and steps into her territory big time.
This is the 2nd book in a series and I had no problem reading it without having read the first book, though I've planning to read it now!