I think this product is INGENIOUS!!
Kelly, it made me think of you because I know you often perch on an exercise ball while doing home school. ;)
So far I don't have a kiddo who seems to need this, but I'm certainly keeping it in the back of my mind for the future. The idea of having a free-standing adult one is really cool, too. I think all of us could use a little leg break while we're sitting at a desk job.