David Chandler, my Tai Chi instructor, made this video demonstrating a variety of hand dances that encourage & promote dexterity, coordination and neural pathway development. I find them to be a fun challenge and try to practice them a little every day. They're also a great way to spend time if you're stuck in traffic, on a plane/train or waiting in the doctors office.
Note: Youtube won't allow this video to be embedded or played through other websites, please see the link below to view directly through Youtube.
Indonesian Hand Dances demonstrated by David Chandler of Eagle's Quest Tai Chi Center
https://www.youtube.com/watch?v=J6SCXphjfZI