Dr. Kawashima's Brain Training: How Old Is Your Brain?
Dr. Kawashima's Brain Training: How Old Is Your Brain? (known as Brain Age: Train Your Brain in Minutes a Day!) is a puzzle video game made by Nintendo on the Nintendo DS handheld. It was released in 2006. It is one of the best-selling DS games. A second game: More Brain Training from Dr. Kawashima: How Old Is Your Brain?, was released in 2007.