The Slingshot Pen should bring you back to the good ol' days of wreaking havoc in the classroom.
Just as its name suggests, the Slingshot Pen is a slingshot/writing utensil hybrid that's pretty awesome. The pen is designed to look like an HB pencil, with the only difference being that it's in the shape of a "Y" -- for obvious reasons. Tie an elastic band on the top and now you've got a weapon in your arsenal. Whether you want to hit a bully, a teacher or a girl you like, the Slingshot Pen should make you happy and content with revenge and mischievous satisfaction.
The Slingshot Pen is currently available for sale at Neatoshop. As a reminder to parents, the kids want this for reasons other than the fact that it can write.