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Kids can practice math facts wherever they go. Instead of bulky flash cards, kids can carry this stylish, portable electronic math quiz with the built-in carabiner clipped to their backpack. Math Trekker™ is self-correcting, with positive reinforcement. The musical payoff and desire to " beat your score" is a motivator for kids. Plus, this electronic item is nearly the cost of a pack of flash cards. 3"