yeah agreed. People forget about the 'too many choices' problem. You can do anything with a blank sheet of paper and a pencil and for most not many people math exercises is not the 1st thing that comes to mind. Not to mention there was that wsj article that links procrastination with abstract tasks...

With Brain Age everything is already done for you and it adds lots of pictures and audio feedback which makes it more fun and interesting as well as being an impartial referee for multiplayer matches