1. Put the pieces together so that the shorter stick is in the cap and the longer stick is in the pen tube.
2. Tie rubber bands to the pen tube and the back end of the stick pieces where you should cut it so that it forms a + or a -.
3. Now have fun and make shure not to get caught with it at school like when I almost did if you need to hide it durring school searches then put it in your sock or near your crotch in pants (Actually works too!!!). Also I have a very small paper/bb laucher I made and I'll make a instructible on it ASAP.