Dr Kawashimaa€™s More Brain Training - How Old Is Your Brain? presents you with a series of new, fun brain-training challenges. 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. More Brain Training a€“ How Old Is Your Brain? is suitable for players aged 3 years and over.