35 years ago, Scott Weaver had a vision of San Francisco in the form of the tiny pieces of wood. It is comprised of the different neighborhoods and iconic landmarks of the city. It is a complex kinetic structure that can be "toured" through by ping pong balls. The structure was made only using toothpicks, Elmer's glue and amazing precision.
This is Rolling Through the Bay:
You must watch the video for the full experience of every tour!
[Images from The Tinkering Studio on flickr]