More Brain Training from Dr Kawashima: How Old Is Your Brain? uses the same format as its predecessor. Held like a book, you are invited to use the unique and intuitive touch screen and microphone features of the Nintendo DS as you take 5 - 10 minutes a day to help your brain stay active with challenging new exercises. All exercises contained in the software are based on easy to execute mathematical, cognitive and language-based tasks. The DS Brain Age Check measures the speed and accuracy with which you perform simple tasks to establish your DS Brain Age. Once this is established you will be set a regime to help stimulate your brain. The DS Brain Age Check allows you to see your progress on the inbuilt calendar.