Ben 10 Grey Matter Leap is one of the Jumping Games that you can play on epetx.com for free. Wow, friends! A new Ben 10 game Grey Matter Leap is here. It is an interesting addition in the Ben 10 Omniverse Series. Do you have no shooting and fighting skills? No need to be upset, because Ben 10 Grey Matter Leap gives a chance to show some other skills. Exhibit your excellent jumping skills with Grey Matter!g skills with Grey Matter!