You are one confused fellow.

Those large exercise balls? You mean the swiss ball?
Yeah, they're useful for a few things.
This is the best way I can think of using it;

http://rosstraining.com/articles/thewaterball.html



And let me think of another way to use it....you could possibly fill it with sand and try cleaning and pressing it
Besides that....swiss ball's are great for...putting your legs on it and try to do pushups. If your face doesn't slam the ground and you break a teeth, by the 6th rep, you're doing it wrong.

It's a toy, think of how to play with the toy.
It's just YOUR brain on lipo-6. My brain on Lipo-6 just goes "hungry hungry hungry!"