It is made from a few simple items that can be found around the office or home.
Needless to say, be careful what you fire at people.
Step 1: What you will need
2 Drawing Pins
Step 3: Make four holes in the Bottle Top
Make the holes at one end approx 2cm apart, and at the other end 1.5cm apart.
Step 4: Bend a Paper Clip and insert into Bottle Cap
This is going to be pushed through the holes in the Bottle Cap that are 2cm apart, so that the arms point out the top.
Step 5: Bend the arms and attach the Rubber Band
To attach the Rubber Band to the arms we need to roughly cut out a 4cm section of the Rubber Band and tie a knot in each end.
Now rest the Rubber Band between the tips of the two arms, then bend the tips of the arms around the Rubber Band and clamp them down. Making sure there is no room for the knots to slip though.
An image of the finished result of this Step is attached as the second Picture File.
Step 6: Bend the other Paper Clip and push into Bottle Cap
Then push it through the two remaining holes.