Our magnetic activity cards make math lessons stick! Kids just slide an activity card into our Self-Checking Magnetic Board (sold separately below), then use magnets to answer the questions on the card—matching and composing shapes and learning how to recognize patterns. When kids are ready to check their work, they press the button—correct answers stay in place, while incorrect answers fall right off the board! The set contains 6 magnets and 12 double-sided activity cards—for a total of 24 activities. Cards measure 8 1/2" x 11".