My father demonstrated the combustion of a mixture of potassium nitrate and sugar to me when I was 7 or 8 years old, and I was instantly hooked. The effect is s

My father demonstrated the combustion of a mixture of potassium nitrate and sugar to me when I was 7 or 8 years old, and I was instantly hooked. The effect is spectacular: thick white smoke, hissing pink flames, a huge charred mass of fluffy carbon, and the smell of burnt sugar in the air. My interest in chemistry up to that point had centered around growing crystals. After that first smoky demonstration I wanted to make fireworks. It's still possible to have that bonding experience today if you have some open space where there is nothing flammable. I see that Amazon has multiple sellers of saltpeter (potassium nitrate), the key ingredient. As recently as last year I have also seen it sold as stump remover in the gardening section of Fred Meyer (Kroger). Potassium nitrate plus various fuels like charcoal and/or dusting sulfur, sugar, and iron filings is great fun and relatively benign. Do any grinding by hand in a porcelain mortar and pestle and there's really no risk of mechanical ignition. The mixtures don't burn fast enough to risk explosive effects unless ground very finely or strongly confined [1]. I had to photocopy the black powder and pyrotechnics sections of The Chemistry of Powder and Explosives from the library, but today you can find a full scan of that book (and much more) online. [1] You can also make more vigorous mixtures with potassium nitrate by using powdered metal fuels, but you're not going to find those fuels just sitting on the shelves of ordinary retailers.