1. Low level explosives:
mix of fuel and oxidator: aliuminium powder and ferrum oxide,
Al powder and potassium permanganate, Magnesium and any nitrate,
wood carbon and any nitrate and sulphur.

These mixtures quickly burn and if enclosed in some box
burning gasses break apart box.

2. High level explosives:

amonium nitrate, dynamite etc. bla bla bla

very difficult and not legal to produce and spread howto information.