More fun than flash cards, this electronic math game provides addition and subtraction practice. Math Trekker is self-correcting and offers positive reinforcement. The musical payoff and desire to "beat your score" is a motivator for kids. Portable, with a built-in carabiner, it clips easily to their backpack.Details:5.7" x 1.4" x 0.19" Batteries includedComes with multilingual guide (English, Spanish, French and German)For ages 6 and upFor grades 1 and up