This is Nintendo's goal with Brain Training...

[A Black Falcon]

I think that the evidence that it helps is stronger for people who truly are old -- like 70+ -- and I'm not sure if this game is really for them, so I'm not sure how much it can help, but it can't hurt, and the research does seem to show that there is some benefit to doing things like that... but yeah, I look at the claim that Brain Age will help in the way they claim dubiously.