“Next month, Nintendo is releasing Brain Age, a DS game based on the research of the Japanese neuroscientist Ryuta Kawashima. Kawashima found that if you measured the brain activity of someone who was concentrating on a single, complex task — like studying quantum theory — several parts of that person’s brain would light up. But if you asked them to answer a rapid-fire slew of tiny, simple problems — like basic math questions — her or his brain would light up everywhere.”