Heroic characters portray antioxidants battling evil oxygen radicals in this lively, science-based story. Skippy, a very intelligent rat, is concerned about his friend Oaf's terrible eating habits, and tries to get his friend to eat healthier food. Oaf is skeptical until Skippy explains the science of nutrition at a molecular level, complete with descriptions of battles between superheroes (antioxidants found in fruits and vegetables) and oxygen-radical villains. Based on fascinating scientific information and including a lesson on genomes and DNA, the book includes playful drawings that clarify its key concepts.