In this video tutorial, viewers learn how to make a pen gun. The materials required for this are: a pen, knife and rubber band. Begin b cutting off the tip of the pen, leaving it with a top cylinder. Then take out the inside of the pen and remove the eraser bit. With the eraser, make a small slit in the center and then clip the rubber band into the center gap of the eraser. Now place the eraser back to the pen. Now loop the rubber band into the clip of the pen and tie it around the pen. This video will benefit those viewers who enjoy making toy weapons and would like to learn how to make a gun from a pen.