This is a test of commonsense. Complete the next sentence:

How to make a crossbow out of a pen
Gather your materials.
You'll need a bic pen (they're usually white, and it must be a bic pen), a rubber band, scissors, toothpicks, and a small screwdriver.
Unscrew the top of the pen and put aside the ink-holder.
Cut the ends off of the pen. Cut the pen so it's 2-4 inches (5.1-10.2 cm) long.