A very famous experiment goes like this:
$\ce{KNO3}$, molten wax and sugar are mixed and later burnt; the resulting mixture produces quite a lot of smoke.
After hearing about the experiment, I threw in the idea, "What would happen if $\ce{NaNO3}$, or other alkaline compounds were used instead?". However, the teacher wants us to be sure that the building doesn't explode. So here I am. Has this experiment been attempted before? What would happen if it was used?
Here is a link with the smoke bomb experiment.