One of my favorite "acts" at the AP Calculus grading show is a juggler.
He got into juggling to show his Calculus students what consistently working on something could accomplish. I have juggled a little (very little and not very recently). Maybe I'll show you some juggling.
Here are some juggling sites I found. Some give the mathematical patterns of juggling. Some allow you see animations of juggling.
http://www.its.caltech.edu/~juggling/science.html
ttp://www.jug.net/wt/jugperfo.htm
http://www.ocf.berkeley.edu/~juggle/patterns.php
http://faculty.whatcom.ctc.edu/wwebber/juggle/juggling_online.htm