Nintendo's brain-building franchise returns for a second round of mental gymnastics in Brain Age 2: More Training in Minutes a Day. Like it's predecessor, Brain Age 2 is inspired by the work of Japanese neuroscientist Dr. Ryuta Kawashima and it features a series of quick math and reading activities designed to "increase blood flow to the prefrontal cortex." Players take part in a series of tests that determine one's "brain age," often taking advantage of the DS's unique abilities by writing with the stylus or speaking into the microphone. The ultimate goal, after weeks of training, is to lower one's brain age to 20.