2 large bolts
Toy gun caps (paper or plastic)
Step 2: Build It
Thread the nut halfway on a bolt.
Step 3: Shoelace
Tie the middle of the shoelace to the end of the other bolt. The shoelace acts as a streamer and helps to ensure that the rocket strikes the ground end first.
Step 4: Loading
Cut free one of the caps and place it bottom side down in the nut.
Step 5: Finish
Thread the other bolt into the nut until the cap is tightly compressed. Now your cap rocket is ready to throw outside against a hard surface. Use the shoelaces as a throwing handle. Stay well away from parked cars and innocent bystanders. The rocket works best if you lob it as high as you can. This allows the shoelaces time to straighten out any tumble before it hits the pavement.
Possible Modifications: Attach real fins to the top of a bolt.