Postman mechanism
These two black & white photos reveal the gear mechanism for
animating the Postman. Dick Kraus built this mechanism entirely out of a junk
pile of old parts he found around the park. The only component that was new was
the motor to make the whole thing run. Notice the hand that
points towards you as you look at the photo on the left. At the very bottom of
that photo are the fingertips of the postman's other hand. The photo
on the right is a reverse angle, and both hands are visible, although a bit
obscured.