I know its really old, but I finally had a chance to play on my nephew's DS.
For those of you who don't know what it is, its a game that measures you current brain age. In order to test your age you play mini games math games or problem solving games.
The mini game that really got me was the mini game that uses the DS voice recognition feature. During that mini game a serious of colors are spelled out and the player has to read it. It does sound easy but it actually isn't because the spelled out words are actually in another color.
So when you see Yellow, your brain may actually think blue at first.
That game alone sold me on getting a DS, I now have something to do when taking my morning deuce :D