It's the annual Kensington Kinetic Sculpture Derby!
What's a Kinetic Sculpture? It's a human-powered vehicle with an artistic theme. It can be anything from a bicycle covered in a cardboard box to a space ship powered by a human in a hamster wheel. The vehicles parade over 2 plus miles of Philadelphia streets, only to face crossing a mud pit at the finish line. Also, going on at the same time (and at the location of the finish line) is the Trenton Avenue Arts Festival.
We'll meet at the studio (Photographers in Philadelphia), then walk a little over a half mile to catch the parade en route (on Frankford, up near Norris), then head over to the arts festival to wait for the mud pit finale. Afterwards (probably about 3:15 or later), for those interested, we'll probably hang out a while at the studio.
For those who don't want to walk, they say there's plenty of parking on Trenton Avenue North of Frankford and York St. Here's a link to the parade route and schedule.... http://kinetickensington.org/when-where-how-get-there