Everyone should give it at least one try.
The core idea behind Brain Age is to "work out" your brain. Brain Age does this by providing you with small daily activities (that make up the main part of this title) that require you to use your mind to succeed. Starting off, your brain age will, most probably, be a high number; 45, 50, 60 or perhaps 70 and higher. As you go through your daily training you get better and better and will eventually reach a brain age of 20, which is the lowest and best brain age you could possibly reach. The game is good at making the activities fun and stress free; in fact, this game requires little skill when it comes to games, a little more when it comes to school. Dont' let this turn you off, because the school skill you need is some grade three math and as long as your not color blind and good at memorizing on the run, you'll be fine.
The game has four files available to keep track of four different users' completed daily activites and updating their improved or unimproved brain age. To keep the game more interesting, the developers provided users with unlockable activities that are playable (in due time - as you get better). Brain Age starts you off with three activities (for training purposes): CalculationX20, CalculationsX100 and Reading Aloud. CalculationsX20, and X100 are self explanatory really, they are a series of 20 or 100 (based on what you choose) of basic math questions that you have to complete as fast as possible (the faster, the better). Reading aloud tests your reading skills and records the number of syllables per second, so the faster you read the better you are. The game requires you to go through a set of daily activities that take up about 10 minutes of your time - the scores you get in such activities reflect your brain age.
Apart from the main "campaign", the game has a "quick play" option that allows other family members or friends, with no intent of playing through the main game, to wet their fingers with some of the games available. The game does a good job at providing a fun atmosphere without going out of its way.
Overall, Brain Age is a simple, fun, productive game that does little to ammuse and ammuses much. With the petty price tag of $20, Brain Age: Train Your Brain in Minutes a Day shouldn't be overlooked by any DS owner looking for a unique experience.