How to Make a Rubber Band Crossbow.

Rubber band crossbows, one of the funnest (on purpose), cheapest, potentialy dangerous weapons known to man-kind. they are one of the easiest to make too. they are also a base for rubber band guns. but to make one, follow these steps.
1. get about 10 pencils and 5 rolls of tape (when making longer, a roll of tape per 2 pencils).
2. put all of the pencils in a line, then tape solid links. each one should be intersecting about an inch into each-other.
3.tape up all of the rest. with duct tape and make sure that there isn't one spot left, yet make sure that the eraser and about an inch of pencil is left up at the tip.
4. get a knife, preferably a steak knife and slice through the eraser, all the way through the metal until theres about a centimeter or a half centimeter left of uncut metal.
5. to make ammo, you can use normal rubber bands or you can tie some rubber bands together to launch (only thinner rubber bands will be able to fit in the slit. Bigger ones will still work though)
6. to launch slide the rubber band into the slit (cut, slice mark, scar, whatever you want to call it), aim, then release.
7. if they don't launch after 5 tries, check for anything clogging the metal part, and if not get the steak knife and make the slit a little wider .
8. try smoothing down the metal, its sharp and can cut you, someone else, the rubber band and a multitude of other things.
You can also make a clip for it to make it repeating, by getting a small thin box with a platform with springs under it, and then you load the ammo.
NOTE: You can also launch things out of the rubber bands like pens, or pebbles.