Brain training

Games are now been developed as "Brain Training" exercises, this includes things such as puzzles, maths questions and other more casual things such as cross words. These games are designed to help keep you mentally stimulated and keep you making quick and accurate decisions. These games have been around for a long time but have since took off with growing popularity after the Nintendo DS started to release brain training games.

An example of the growth of these games can be seen here:
http://www.washingtonpost.com/national/on-innovations/lumosity-sees-brain-games-taking-off-as-20-million-sign-up-for-mental-gymnastics/2012/02/06/gIQAQu4qtQ_story.html