When No2Son was a lot younger, I challenged him to see who could learn to juggle three balls in the air first. I started out using tennis balls, but every time I dropped one, it bounced so far away and I got tired of chasing after it, so we changed to fabric juggling balls. They didn't escape so easily, plus they were smaller and easier to handle. I soon got the hang of keeping three balls in the air, but he rapidly developed amazing juggling skills, and in no time was able to bicycle down our street (no hands) and juggle at the same time. I wish we had a video of that!
However... have a look here. This is one of the most amazing displays of coordination talent I've ever seen. Make sure your speakers are on, and you can hear the music. His name is Chris Bliss.
Sorry, I haven't figured out how to post videos yet!