Seriously, is it that hard to create gunpowder? 75% potassium nitrate (fertilizer, the higher the concentracion of the potassium nitrate in it, the better), 15% coal (burn soft wood in a closed pot), 10% sulfur. All of these can be bought in most shops. Grind the coal with a coffee grinder until its nothing but dust. Now mix these together (DON'T USE ANYTHING METAL DURING THE MIXING. MIX IT IN SOMETHING PLASTIC OR WOODEN TO STORE THE GUNPOWDER AND USE EG. A WOODEN KITCHEN SPOON TO MIX THE 3 POWDERS). Now take out something like a teaspoon of the gunpowder, bring it out to your garden and ignite it. Enjoy. And try to protect the gunpowder from humidity, otherwise it cannot be used. Now if you put it into a thick metal ball that is sealed well and you put a fuze into it, you just have a nice makeshift grenade…