Guinness World Records has certified that this awesome machine built by Austin Granger (previously at Neatorama) is the world's largest K’NEX ball contraption.
Brickmania Toyworks in Minneapolis commissioned this work. It has 126,285 K’NEX pieces and runs 278 meters Granger is a 23-year-old computer science student at the University of Minnesota. He’s been building K’NEX projects since he was five years old. -via Viral Viral Videos