I have another great idea for a prank, just make sure that the cops are okay with it. It's called 'The Backyard Bazooka'. You will need:
1 yard of 1/2" PVC pipe
A small drill bit and drill
A wooden dowel equal in diameter to the drill bit
100 grams of baking soda
500 milliliters of vinegar
1 quart plastic bag
Gorilla glue
A two liter soda bottle
Cardboard
Construction paper
Play-Doh
Food coloring (any color or colors, just make sure that you can see them through plastic)
2 screw-top bottle caps
Directions for building the launcher itself:
Step 1.) Slide the neck of the bottle onto the PVC pipe
Step 2.) Drill a hole through both layers using the drill and bit
Step 3.) Pull the bottle off, and then coat the end without the drilled hole with Gorilla Glue
Step 4.) Do the same with the first bottle cap, and then slam it onto the coated end of the PVC using a hammer
Directions for making ammunition:
Step 1.) Slide the neck of the bottle onto the PVC pipe
Step 2.) Fill the gaps with Play-Doh, and then drill through the neck of the bottle so that the hole in the bottle lines up with the hole in the PVC
Step 3.) Make a nose-cone from the construction paper, and then attach it with the Gorilla Glue
Step 4.) Make fins from the cardboard, and make sure that the direction each one points is offset 10o from the center line of the rocket to allow it to spin stabilize. Also, make sure that each one is offset in the same direction.
Step 5.) Pour a few drops of food coloring onto the baking soda
Step 6.) Put the other 50 grams into the bottle (do not shake it!)
Step 7.) Put the 1 quart plastic bag in the bottle, but let its edges stick out over the neck
Step 8.) Pour the 500 milliliters of vinegar into the plastic bag
Step 9.) While keeping the edges of the bag over the neck of the bottle, screw on the bottle cap. This will allow indefinite storage.
Step 10.) Allow the Play-Doh to harden
Directions for loading and firing:
Step 1.) Unscrew the bottle cap, and push the bag into the bottle without letting the bag spill its contents
Step 2.) Slide the PVC pipe into the neck of the bottle, and slide the wooden dowel through the holes
Step 3.) Make sure that the seal is tight, and then tip the entire assembly over. If done correctly, the fluid in the bottle should turn the color of the food coloring. This means that the launcher is 'hot'.
Step 4.) Shake the launcher as quickly and mightily as possible to mix the reactants
Step 5.) If all goes according to plan, the round should pressurize in approximately ten to fifteen seconds
Step 6.) Choose a target, then slide the wooden dowel out as quickly as possilble to allow the bottle to shoot off
This is a fearsome toy, and it will bring joy for years to come due to its simplicity, efficiacy and durability.
-Penguin
