Worms are small organisms that have a valuable role in their surrounding environments. Readers learn about all the important ways in which worms contribute to their ecosystems, proving that no creature is too small to make a difference. Creative design elements, including eye-catching fact boxes and colorful photographs, draw readers in to the weird and wonderful world of worms. As readers explore essential science curriculum topics, such as ecosystems and food chains, they also learn fun facts about creatures they see often but most likely know little about.