MathShark turns math into a game that quizzes children in different skill levels: addition, subtraction, multiplication, division, fractions, decimals & percentages. As they see their time improve, children are continually motivated. Game includes a portable, handheld device with an LCD that clearly displays problems horizontally & vertically & gives immediate feedback. Help key provides additional clues for solving problems. Display switches to a full-function calculator with the touch of a button. Math game is perfect for children ages 6 to 12. It requires two AA batteries (not included).