In Praise Of Dangerous Toys

When I was growing up, my dad taught me that potassium nitrate, sulphur, and charcoal made gunpowder. He told me that you could add iron to the mix to get a red flame and that acids wouldn't eat through your test tube. Then he sent me into the basement to make whatever I wanted while he read the paper.

Source: http://feedproxy.google.com/~r/Techcrunch/~3/tknSQzY1s9A/

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