Juggling and the brain
Juggling isn’t just a great psysical workout for your body. Juggling will also improve your eye-hand coordination and multitasking abilities, which will help you in many other non-juggling related sports and activities.
Several scientific studies have even shown that learning to juggle will lead to positive changes and increase in the white matter of the brain.
You can read more in this article from the University og Oxford:
http://www.ox.ac.uk/news/2009-10-12-juggling-enhances-connections-brain
or download the article here