From Youtuber Austron:
This is a short teaser for my latest construction project, the world’s largest K’nex ball machine, at The Works Museum in Bloomington, Minnesota.
The machine stands 23.5 feet tall and 40 feet long, and contains over 100,000 pieces. It has 2 lifts, 3 motors, and 8 paths, including a 20 foot free-fall, an 8 foot tall big-ball-factory spiral, and a 60 foot long path which hangs from the ceiling. It takes 3 and a half minutes for a ball to climb to the top of the tallest tower.