When Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #17: A Crazy Day with Cobras, they had lots of questions. Can snakes really be charmed? What reptile has the deadliest venom? What do Komodo dragons eat? How do you tell alligators and crocodiles apart? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs.