I just stumbled on a fascinating blog called Colossal. I am loving just about everything he has posted, but this piece in particular was wild. In artist Scott Weaver's own words:"Rolling through the bay is an abstract toothpick sculpture of San Francisco. It has about 100,000 of toothpicks. The amazing part, is that is has four ping pong ball paths that roll through different landmarks of San Francisco. I have spent about 3000 hours on it over a period of 34 years and the only glue I use is Elmer’s."
Read more and see more images and a video of the ping pong balls in action here.