Turns math into a game! Quizzes eight different skill levels in addition, subtraction, multiplication, division, fractions, decimals and percentages. As they see their time improve, kids are continually motivated. Portable hand-held device has an LCD screen that clearly displays problems horizontally and vertically and gives immediate feedback. Converts to a full-function calculator. Details:14.9" x 6.2" x 1.07"Converts to a full-function calculatorRequires 2 "AA" batteries (not included)For ages 6 and upFor grades 1 and up