Stump remover is cheap and plentiful. I tried to make gunpowder with it but it was not what I hoped. (It fizzled and went out). What I did have more success

Stump remover is cheap and plentiful. I tried to make gunpowder with it but it was not what I hoped. (It fizzled and went out). What I did have more success with is smoke bombs. Mix sugar and KNO3, heat up slowly in a non-stick pot until molten, pour into appropriate molds, let cool and ignite as desired.