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I agree w/ most all of your points. But for Chemistry, due to the inherent danger of so many chemicals, we do have to explicitly describe the experiments before undertaking them. At least until we train the young scientist to a minimal professional standard of competence.
Chemistry sets for kids can provide lots of learning. But they do have specific instructions expected results. Unlike reading, mathematics, programming, drawing, and other pursuits, modern chemicals and equipment do burn, explode, poison, and electrocute.
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