Do any one know how to make a pen gun?

Question

my friend like to shoot me with his and i will like to get him back

Answer 1

www.rotteneggs.com

Answer 2

here  i  found   some  for you to check http://search.yahoo.com/search?p=how%20t...

Answer 3

Take a regular bic plastic pen not the crystal ones. Take the flat blue cap off the end. Pull the ink thing out. Tape an elastic band to the writing end. To fire put the in the non writing end backward and its like a slingshot with a barrel.