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This is an absolutely amazing video. Fifteen pendulums, each with a period of one swing more per minute than the previous pendulum, produces magnificent designs from snakes to spirals to near chaos and back to a swinging line once again. What would be interesting is to see the graphs of each position in time of all the pendulums – this would have to be 3 dimensional, with pendulum number, distance from center and time. Or with a sinusoidal equation. I’m wondering what to do with this in regards to middle school students, and what could be seen on a two dimensional graph. I can’t think of anything. Here’s the video Krulwich Wonders: A Pendulum Dance