Childhood Memories of Our First Home made Firecrackers

[CINDERS]

We used to be able to get Potassium Nitrate from a medical supplier just drop in on the way home from High school then they stopped selling it to us so we switched to Soduim nitrate which gave you a type of slag when it burnt no where near as good as the pot nitr.
I backed off that and started to make a thermite powder way more fun and a really brilliant flame all was good until that eventful day I mentioned earlier that my dad took a real dim view of his son playing the amateur alchemist in our backyard.