World's Largest Rube Goldberg Machine - Make:

This 300-step Rube Goldberg Machine claims the world’s record:

The Purdue Society of Professional Engineers team smashed its own world record for largest Rube Goldberg machine with a 300-step behemoth that flawlessly accomplished the simple task of blowing up and popping a balloon – setting the new world record for the Largest functional Rube Goldberg machine, according to World Records Academy.