You may remember K'NEX, the construction set with endless possibilites.
Well, wait until you see what one man did with some creativity, a lot of time and about 40,000 K'NEX pieces.
Austin Granger, who has become somewhat of an Internet celebrity for his amazing K'NEX creations, posted a video of what he calls his "most complex structure to date." And that's saying something.
The St. Paul, Minn., native spent eight months building the ball machine, which has 450 feet of track, 21 different paths, eight motors, five lifts, and "a one-of-a-kind computer-controlled crane, as well as two computer-controlled illuminated K'nex balls."
And Granger wasn't exactly working with a ton of space -- he created the entire structure in his bedroom.