In this video, we learn how to make a gun out of a pen. You will need: 2 pens, rubber band, pins and tape. First, grab your pen and take the inside of it out. Now take the shell and tape the rubber band to one end of it. Now when you pull the rubber band back it will look like a sling shot. Now take your other pen apart and tape a pin to the front of it. You can now put the part with the pin into the shell of the other pen. To shoot, pull back the rubber band and release it. The pin will then stab into whatever you shoot it at!