I got one for $1 at a thrift store! It's a good one too, I'm so happy! (I have a son and therefore could use a bladder lift! Bouncing you know...ahem)
I looked up stuff on youtube.com and found "clips" of exercise-but ideas none the less. And what they work out, take a gander and just add the time you want to each idea...you know?
One I found that was interesting is --you sit on your butt, heels on the floor and attempt to bounce up and down on your butt. (You'll look like a chicken flapping your arms to get going, but its fun and easy!) My stomach killed the next day! So it worked!
Now, I too, must actually USE the thing!! (My three year old should be ripped, he loves it!!)Good luck gal's! Here's to being BUFF!
-Squirrelletta