Brain Age is a game that helps you develop mental skills.

User Rating: 8.5 | Brain Age: Train Your Brain in Minutes a Day! DS
There are a few small games that can be played and the big test your brain age game. The games contain things that you need to solve. You will need to add, multiply, subtract and divide really quickly to get high scores on the game. The really bad thing about this game is that there is barely anything to do! There are barely any games at all and things will get boring after a while. You might want to just rent it if you are interested in it. It's not a very good game to buy because of its limited features.