Pen-shooting things

I can't think of a better topic to inaugurate the (occasionally dangerrous) Things You Can (but probably shouldn't) Make At School group than the topic of things that shoot (or fling) pens, like the thing that I made that is in the picture.

Picture of Pen-shooting things
try the bic pen bow. it is awesome
try taking a mechanical pencil and taking the top off and putting a staple in the hole where the lead goes then pull back on the back and it will shoot i once accidentaly shot it at my teacher. she got so mad
tofood10 years ago
can you explain how to make this? How far does it shoot?