It's the game that is sweeping the world! With over 1,000,000 copies sold in Japan, KENKEN™ is poised to be the hottest game of 2008. KENKEN™ is a number puzzle, that's entertaining and challenging at the same time. It's fun, not only for adults, but for kids and well. In fact, KenKen helps children increase focus, hone math skills, and improve powers of thinking and concentration. KENKEN™ number puzzle also gets raves from puzzle fans who want something more challenging, and baby boomers who want to keep their brains "young and sharp." KENKEN™ number puzzle books are available both for children and adults.