If you're bored of playing games that don't stretch your brain cells and you'd like to give your grey matter an extensive workout, pick up this program. The tests have been devised in cooperation with Dr. Kawashima himself, a renowned neuroscientist. With Brain Training you can train both your mental awareness and your memory. Hold the DS vertically, like a book, and write your answers with the stylus on the touch screen. The exercises are quick challenges that help stimulate your brain. There's a combination of arithmetic, reading and memory tests, and the program calculates your score in the form of a 'brain age' by assessing the speed and accuracy by which you perform these simple tasks.