Rubber band gun is a great toy. There are many models - from single-shot to full automatic machine gun. I recently had a takeaway meal which came with disposable chopsticks.
I made a decent rubber band gun by the chopsticks and some rubber bands.
The cost? A few rubber bands.
Step 1: Material
1. Four chopsticks - you may use sticks of similar length such as pencils. Straws are not tough enough.
2. 10 to 20 rubber bands
Step 2: Cut the Chopsticks
1. The first chopstick - the trigger, the barrel and the front site.
2. The second chopstick - the grip.
3. The third and forth chopstick - the barrel.
Step 3: Putting Them Together
When they put together, the gun should look like this.
Tie the front sight and the barrel by the rubber bands. The tie must be tight as the stress will be quite large on them.
Step 5: Make the Grip
Make a triangle grip. Again, tie them by the rubber bands.
Step 6: Finally, the Trigger.
Again, tie the trigger by a rubber band.
Step 7: Load the Weapon
Load a rubber band between the front sight and the trigger.
Pull the trigger and fire the rubber band.
It can easily shoot to over 20 feet.
and see how I killed a couple of flies by this gun.