Jack and Pink send us the da Vinci Days’ Graand Kinetic Challenge - a premier annual two-day kinetic sculpture race held every third weekend in July in Corvallis, Oregon.  The 33rd annual event took place on July 18th and 19th - celebrating the theme “Kaleidoscope Colors”.  Teams engineer massive, whimsical, completely human-powered vehicles designed to navigate approximately 15 to 16 miles of all-terrain obstacles including paved streets, sand dunes, a deep mud bog, and the Willamette River.  Trophies are awarded for Best Bribe, Most Zen, Best Engineering, and Best Song - with the most coveted LEO award (honoring Leonardo daVinci) being given to the the team who follow all engineering and terrain rules without outside assistance.  
More pics and information here