A Leap Frog
Like the kid's game, but instead of jumping over each other, they show their butts and stick their junk in each other's butts.
The leap frog game was on, and every time someone jumped, they showed their butt and got penetrated by the next person.
During the leap frog game, the kids took turns showing their butts and sticking their penises in each other's butts.
The leap frog game got wild when the kids started using their hands and feet to help with the butt penetration.