A delight for readers of all ages. Features over 250 superb illustrations including algae, molds, bacteria, protozoa, and viruses Emphasizes the beneficial role of microorganisms everywhere in the natural world, from oceans to the child's own body Communicates the usefulness of microorganisms by relating them to children's everyday experiences, from eating yogurt to taking medicine Presents scientifically accurate information in an age-appropriate format that is both colorful and captivating