Learn some basic facts about spiders, a member of the arachnid family. Detailed graphics, diagrams and video images help us learn about the anatomical differences between spiders and insects, how spiders make webs, types of web structures, spider eggs, the importance of spiders in our ecosystems, varieties of spiders and their habitats, molting, smallest and largest spiders, and interesting spiders. Multiple-choice reviews at the end of each segment reinforce important concepts.