Juggling balls is a good exercise for your brain which can produce significant changes to the structure of your brain.

Juggling can also help boost your reaction time, hand-eye coordination and manual dexterity. According to scientists at Oxford University, complex tasks such as juggling can produce significant changes to the structure of your brain. As per the study, the scientists saw a 5% increase in white matter - the cabling network of the brain. Changes in the grey matter, where the processing and computation in the brain happens, were earlier shown by German researchers in a study published in the journal Nature.