BRAIN AGE, for the Nintendo DS system (also available on Nintendo Wii), is a thinker game designed to improve the brain response of the player. One begins by testing their Brain Age, with 20 being optimal. This is done by completing three mini-games that vary each time you take the test. Once you know your brain age, you can spend time each day playing games meant to train your brain to respond faster. Some of the games include calculations (how fast you can do 20 or 100 arithmetic problems), reading aloud, and word memorization, to name a few. Each game is fun and challenging...in the beginning. After a couple of weeks of "training", you have unlocked all the available games and played them to the point of boredom. I would like it if the game offered more mini-games. I'd prefer a game engage my attention for more than two weeks. I also wish Nintendo would refine their character recognition system. It's frustrating when the game misreads your entry (a four as a nine, for example) and docks points for an error when you didn't make one. Overall, it's a good game, and among the brain and puzzle games currently available for the DS, it's still one of the best.