The Garden of the Blind

I just stumbled on a site (okay, it was part of a site that I've had bookmarked for years, but I'd never browsed any of the rest of it until today) that has an applet that demonstrates how to count in binary on one's hands. It uses the big-endian approach that I disapprove of, but otherwise it can be a useful tool in showing how one should count. It goes all the way to 1023.