Not only are these puzzles fun but KenKen helps children improve concentration, logic and arithmetic skills. Children ages 9-12 have excelled in math and gained real-life problem solving skills all from playing a puzzle so engaging that it keeps them coming back for more. This third volume of I Can KenKen features: * 75 easy addition and subtraction puzzles * Introduction and how to solve instructions from Marilyn Burns * "Home and Classroom Guide for Parents and Teachers" by Ms. Burns * Forward by Will Shortz