Dr Kawashimaa€™s Brain Training - How Old Is Your Brain? presents you with a series of fun brain-training challenges that incorporate word memorisation, counting and reading, along with Su Doku number puzzles. The Nintendo DS touch screen lets you write your responses, and the more frequently you challenge yourself, the better youa€™ll become at the tasks and the lower your estimated DS "brain age" will be. Brain Training a€“ How Old Is Your Brain? is suitable for players aged 3 years and over.