21-year-old Austin Granger sits among his massive K”NEX structure in his room in St. Paul, Minn., on Wednesday, September 13, 2012. Built with more than 40,000 parts in over 8-months, the machine has 21 paths for ball to travel and four lift systems to take them back to the top, including a computerized overhead crane system. To see videos of his this contraption and past ones, visit http://www.youtube.com/user/austron
(Pioneer Press: Ben Garvin)