Now kids can practice multiplication and division wherever they go with Math TrekkerT! Rather than lug around big, bulky flash cards to try and learn, kids can carry this cool, neon-colored, portable, electronic math quiz with a built in carabiner to be able to clip it onto their backpacks. Kids will be motivated by the musical payoff and the desire to beat their previous times. The Math TrekkerT is self correcting with positive reinforcement. Product Dimensions: 3' x 3.75' x 1'. Recommended for grades three and up, or ages 8 and up.