Brain Age is a game of mathematical equations, logic puzzles, reading exercises, and more with the curious goal of stimulating a player's gray matter. Based on the research of Japanese neurologist Ryuta Kawashima, the premise behind Brain Age is that certain regions of the brain can become more active, more "healthy," through specific, timed exercises repeated on a daily basis. Played with the touch screen positioned on either the left or right side, like a book, the game involves using the stylus to jot down numbers, draw lines between dots, and so forth, while the microphone is used for calling out colors, reading passages aloud, and various other functions.