As relaxing, amusing and intriguing as any other: "an impressive Rube Goldberg machine with a 4-minute course. The beads move in a chain reaction divided into several more complex steps, including the one with a whiteboard that turns to release new balls positioned on the back side."
Rube Goldberg machine of the day
Watch this video on YouTube. As relaxing, amusing and intriguing as any other: "an impressive Rube Goldberg machine with a 4-minute course. The beads move in a chain reaction divided…