Leon and the Spitting Image by Allen Kurzweil

This book is about a hotel full of animals. And an evil ice maker. And glass eyeballs -- oh, and really old panty hose and Possibly Fake Hair. But mostly, it's about Leon Zeisel and his epic quest to survive fourth grade, despite his teacher, Miss Hagmeyer, and his archenemy, Lumpkin the Pumpkin, a human tank with a deadly dodgeball throw. Luckily, Leon has friends who will stand by him even if his magical plans for rescue and revenge involve ... SPIT!