Each Fandex takes a particular subject–dinosaurs, painters, mythology, presidents–and provides you with about 50 cards of information on the subject. The cards are fastened together at the bottom, so they fan out as you read them. Each has a picture at the top, and information on the front and back of the card. In the Body Fandex, for example, one card has a picture of the skeletal system and corresponding information. Surprisingly informative, and fun for car trips, Fandexes come in every flavor. In addition to those mentioned above, Amazon also carries Fandexes on the United States, wildflowers, trees, birds, explorers, the Civil War, American Indians, Shakespeare, first ladies, mummies gods and pharohs, New York, and cats.