Purdue University students won the 18th annual Rube Goldberg Machine Contest with a creation that changes batteries in a flashlight.
How to turn on a flashlight--the hard way
Purdue University students Kevin Hollingsworth, left, and Shawn Jordan leap into the air after their creation won the 18th annual Rube Goldberg Machine Contest. Their machine took 125 steps to remove two batteries from a flashlight, replace them and then turn on the flashlight.
Credit: Purdue News Service photos/David Umberger
How to turn on a flashlight in 125 steps
Erin Miller of the University of Texas, Austin, works on resetting her team's machine, which finished in third place in the Rube Goldberg contest. This page includes audio and video from the contest.