This annual late-April event is part of the Bodega Bay, CA Fisherman's Festival. Teams compete in several heats after first making their boats on the spot. All have the same limited time, (3 hours), and material, (mainly a couple of sheets of plywood, screws, duct tape, etc.), to work with before launching their usually dubious vessels in the chilly but mercifully shallow waters of Bodega Bay.
Many prizes are a awarded and a good time is had by all!
Check it out at http://www.bbfishfest.org/boat.html