Get yaself a mini M&M tube and fill it about 2/3s full with amonnium based fertilizer. Then soak a cotton ball in petrol and put it on top of ya fertilizer. Close it up and peirce a tiny hole in the top of the tube and stick a match through the hole.Strike the match and run like hell.
Of all the cheap homemade bombs available, the WD bomb is one of the coolest. If you're lucky, you can even get a nice mushroom cloud with this bomb.
FULL can of WD-40 (or any compressed flammable substance) 1 tube of rubber cement 1 lighter (or match) 1 bb gun (can be reused) 1 bb (can be reused if you're stupid enough to spend the time to find it)
Put the WD can down on the ground. Cover it with the rubber cement. Then, light the rubber cement. If you got the good kind of cement, it should burn well. Now, get the hell away and shoot it with the bb gun.
Potassium Permanganate bomb:
1. Aquire a glass container and put in a few drops of gasoline.
2. Cap the top off and turn the container around to coat the inner surface.
3. Re-open and add a few drops of potassium permanganate solution (stolen from school)
Footnote: To detonate just throw against a hard object. This is very powerful!! I read that this is the same as a half stick of dynamite!
Fun with alka-selzer:
How to piss people off:
 During the night (or when they're not home) take 10 packs of the old Alka-seltzer and drop it down their hose, then fill the open end up with Glue (a caulking gun works best). Then wait till they try to water their lawn and watch the hose explode in their face.
 Break up the Alka-seltzer and sprinkle it all over their lawn.
 Feed it to their dog. (It makes them Fart Bad!!!)
 Put it in his Gas Tank of their car. The more you put in the better.
In the Supermarket:
 Hide one in a Tampon.
 Empty out a nose drop bottle. Then break the Seltzer up into dust size pieces, and put them in the bottle Re-seal the bottle and put it back on the self.
 Put it in Tooth Paste
 Drop one in the Fish Tank in Biology.
 Shove some down the drain holes in the Drinking fountain.
 Place one in a hamburger during lunch.
 Drop it in somebody's project in Chemistry. (You get some strange effects with this one!)
At the park:
 Feed alka-seltzer to a seagull and watch it explode
 Give it to little children and tell them they're love hearts.
Well, thats all I can think of right now. Maybe if I get bored again I'll add some more to it. But Probably not.
There are two types of flour bombs.
a) stupid b) flammable
The stupid kind is to take a paper towel, put flour in it, roll it up, tie it with a rubber band, and chuck it at somebody. Duh, hours of fun for the idiot.
The flammable type requires an air pump (compressor, tire pump), or a stupid friend that will agree to blow down a long tube into a box with flour in it.(eg. me) Anyhow, the box has a hole on each end of it, and one hole has the tube with some way for air to come in. In the box in front of the other hole (but not sitting in the flour) you need some flame source. It can be a candle, burning paper, brazening torch, flesh, whatever, just something that's gonna burn for a while.
Now, whenever some poser fag walks by, or you find one, you activate your air....there goes the flour. "Big shit," you say, "so there's flour around." Ah yes, but flour is flammable. So when it passes through the flame, it makes pretty orange and red lights. And, you can make this entirely out of things in the kitchen. Funfunfun...
Simply put a shovel-full of FRESH (the runnier the better)cow shit into a paint tin. Ram the lid on hard and run like hell !!
The paint tin will explode very quickly, sending shit in all directions.
( There must be a pun for this, however, I can't think of one, dammit, must be losing my touch)
Get a container and bung any two chemicals in the container that will react to produce hydrogen eg. Li and H2O or Ca and H2O. Quickly place a balloon or Johnny over the top of the container and collect the gas. Grab a bit of string and skillfully stick it up inside the balloon and tie the balloon off. Soak the string in petrol and go outside. Light the string, let go of the balloon and get under cover, eg. inside. The balloon will float upwards and soon the hydrogen will ignite, expand in the heat, and cover the area in a fireball a few metres wide.
Bleach plastique explosives
Potassium chlorate is an extremely volatile explosive compound, and has been used in the past as the main explosive filler in grenades, land mines, and mortar rounds by such countries as France and Germany. Common household bleach contains a small amount of potassium chlorate, which can be extracted by the procedure that follows.
First you must obtain:
A heat source(hot plate, stove, etc.)
A hydrometer, or battery hydrometer
A large Pyrex, or enameled steel container(to weigh chemicals)
Potassium chloride(sold as a salt substitute at health and nutrition stores)
Now take one gallon of bleach, place it in the container, and begin heating it. While this solution heats, weigh out 63 grams of potassium chloride and add this too the bleach being heated. Constantly check the solution being heated with the hydrometer, and boil until you get a reading of 1.3. If using a battery hydrometer, boil until you read a "FULL" charge.
Take the solution and allow it to cool in a refridgerator until it is between room tempature and 0 degrees Celsius. Filter out the crystals that form upon cooling. This process of purification is called "fractional crystallization". These crystals should be relatively pure chlorate. Powder these to the consistency of face powder, and heat gently to drive off all moisture.
Now, melt five parts Vaseline with five parts wax. Dissolve this in a white gasoline (camp stove gasoline), and pour this liquid on 90 parts potassium chlorate (the powdered crystals from above) into a plastic bowl. Knead this liquid into the potassium chlorate until intimately mixed. Allow all gasoline to evaporate.
Finally, place this explosive into a cool, dry place. Avoid friction, sulfur, sulfides, and phosphorous compounds. This explosive is best molded to the desired shape and density of 1.3 grams in a cube and dipped in wax until waterproof. These block type charges guarantee the highest detonation velocity. Also, a blasting cap of atleast a 3 grade must be used.
The presence of the afore mentioned compounds (sulfur, sulfides) results in mixtures that are or can become highly sensative and will possibly decompose explosively while in storage. You should never store homemade explosives, and you must use EXTREME caustion at all times while perfoming the processes in this article.