Wired on the only interesting DS game (k3nshi)
"Indeed, for something that doesn't even seem like normal "game," it's weirdly addictive. The math questions had me so frazzled that I emotionally regressed to about age ten. Brain Age also includes a Stroop test, which flashes the names of colors on screen in mismatched ink -- for example, the word "blue" printed in red -- and challenges you to name the color of the ink. As any psychologist will tell you, you can keep a lid on things for the first dozen words, but then your brain turns to jelly."
Read the rest here.