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On May 7 a total of 5,401 students gathered in Coors Field in Denver for what has been officially named the world’s largest physics lesson. Steve Spangler, an educator whose company specializes in materials for simple science demonstrations, provided nearly an hour of hands-on science activities.
They include Spangler’s Wind and Solar bags (inexpensive at his website, or you can make your own with cheap garbage bags and masking tape), potato shooters (which work on air pressure) and, of course, his famous Diet Coke and Mentos geyser.
Guiness World Records was on hand to verify the event. I also heartily recommend a visit to Spangler’s website, where you can find all kinds of interesting, easy-to-do experiments, complete with videos and instructions.