Kids can practice math facts wherever they go! More fun than flash cards, this stylish, portable electronic math quiz clips easily to their backpack with the built-in carabiner. Math Trekker is self-correcting and offers positive reinforcement. The musical payoff and desire to "beat your score" is a motivator for kids.Details:6" x 1.43" x 0.19" Batteries includedComes with multilingual guide (English, Spanish, French and German)For ages 8 and upFor grades 3 and up