Rube Goldberg Machine experiments! Mr. Lese’s History of Innovation class built and tested Rube Goldberg machines, a contraption that uses a chain reaction to perform a simple task in a complicated way. A Rube Goldberg machine involves a series of tasks to trigger one event after another to accomplish a goal. The machine often uses different forms of energy, such as kinetic, gravitational or potential energy — or in one case a cell phone vibration to knock down dominoes. | Marquette University H