Pen Gun

Step 1:

Get a spring from a pen or pacer then take a part a pen but don't lose anything.

Step 2:

Put the spring in the pen the way it will go in.

Step 3:

Put the ink cartridge through the way you put the spring in then pull the ink thing and let it fly.

P.S. if you get in trouble at school it will not be my responsibility, do not press charges please