A Very Improbable Story

A Very Improbable Story: a math adventure by Edward Einhorn, illustrated by Adam Gustavson, Charlesbridge, 2008, ISBN 978-1-57091-871-1
PS: Waking up one morning and finding a talking cat on his head, Ethan is informed that the cat will not leave until he has won a game of probability.
"How likely is it that something will happen?" The cat leads Ethan on to several games, involving coins, socks, and marbles, which would be fun and easy to recreate in a classroom setting. Some kid is bound to ask: who cares? The author answers this at the end of the book, when Ethan figures out what kind of soccer kick to make in attempting to score a goal! (The books doesn't tell us whether Ethan wins his soccer game or not!) By the way, the theory of mathematical probability was developed in 1654 by two French mathematicians, Blaise Pascal and Pierre de Fermat.
Charlesbridge Publishing company has several books connecting math and literature. See them here, along with other interesting books from Charlesbridge.