all you need to do is take the pen apart so you get the ink inside but keep the rest of the pen
Step 3: Puting it together-1
attach the rubber band to the pen (YOU HAVE TO DO IT LIKE IN THE PICTURE)by wrapping the rubber band around both ends of the rubber band ( wrap it around HARD so that the rubber band does not come off when you pull it back)it should be a some what tight pull. The picture in the corner is to show how it should look( I just got a bad picture of it
Step 4: Putting it together-2
get the paper and cut a strip off about an inch long and roll it up and tape it so it stays rolled up and stick both of the rubber band sides past the rolled up paper.
Step 5: Putting it together still
now fold the other 3/4ths in a long rectangle and fold it in half over the pen like in the picture and tape both sides together.
Step 6: Done finally
now stick the ink threw the scope looking thing and get the pen balanced on both strands and if you shoot it right it will fly