When I was in college I was given the classic "learn to juggle" book for a birthday present. Even then I was famous for walking into things, people, air, etc., and a friend thought juggling might help. Well, it didn't really, as instead I started hitting things, people, etc. with the bean bags. I don't think I ever got it going for more than 10 seconds at a time.
But maybe if I'd had this extremely cool juggling "simulator", I'd've done better. Now where did I put those beanbags...