sevenhills

Hey, good to be here. Dont be put off by how little I know, I'm filling my free time with mental and physical fun, and science is next on my list.
I should first get across how little I know of Science beyond GCSE. I know as much about science as a moth does about hot bright lights. Very little, I just tend to go towards it at my own peril.

I was dead keen on getting to grips with some basic reactions. So I went for Potassium nitrate, and sugar. Smoke. There were two issues. One, I read nitrates are bad for your blood, and two, stump remover and tomato fertiliser does not contain Potassium Nitrate, it's labeled as Potassium Oxide (64% at most), which I gather reacts with water like bleach. I am by no means sure, but surely if its Oxide, then there is no more reaction to be had when filtered to its pure form, and mixed with sugar.

How can I sate my lust for a hands-on-basic-shed-manufactured-so-as-to-produce-a-safe-round-people-smoke reaction?