QUIZMO Flips are a great way to add questions and challenge to QUIZMO units or sets. The QUIZMO Math Madness Flip is the simplest (and most painless) way to make math fun, with easy-to-follow hints and 460 questions that range from basic arithmetic to word problems to graphs, averages, and simple geometry. Each QUIZMO Flip folds over and locks with magnets (included) to become stand-up easels. It's an overwhelmingly positive experience for kids . . . except when they're working with negative numbers! Quizmo Answer Unit not included.