Exercise is the key to good health, both for body and mind - and now there's finally a way to make mental exercise simple, fun, even competitive. Inspired by the work of prominent Japanese neuroscientist Dr. Ryuta Kawashima, the Brain Age games feature activities designed to help stimulate your brain and give it the workout it needs like solving simple math problems, counting currency, drawing pictures on the Nintendo DS touch screen, and unscrambling letters.