Flex the biggest muscle in your body and keep it running at optimum level.

Scientists all over the world agree that leading a mentally stimulating life can increase brain power and the authors of this popular series have come up with another brain-boosting title that is sure to get your mental wheels churning while you enjoy hours of fun. Develop a six-pack brain with more than 301 games, puzzles, and exercises that provide the ultimate mind-blowing workout and keep your brain sharp and alert for life.