Cardapult are business cards at first sight, but with a little folding, they can transform into miniature siege weapons. These unique cards are built by Bryce Bell of Cardnetics.
These cardapults hurl pins 8-10 feet into the air. In one of his videos, Bell used his card to shoot a metal paperclip in a can placed a few feet away. Bell and Cardnetics revolutionized the whole business card concept, not to mention solved the eternal question, “What do I do when I’m bored in the office?”
These cards come with instructions on the back so you can fold your own catapult. It should be easy to make and print your own as well, since the creator posted some very easy to follow instructions on his site.
Source: Cardnetics.com
http://cardnetics.com/index.php?main_page=product_info&cPath=1&products_id=6
