You will need to take the metal and eraser part off of one of the pencils and put a notch like a real arrow. You can use more than two pencils you need one for the base and the rest for ammo put a notch in those and take the eraser part off of them.
Step 2: Rubber Band
Next you need to put the rubber band on anyway but it has to work like a bow. It is all about using your head.
Step 3: All done
It should be something like this.
Step 4: Naruto 777
Please look at Naruto 777's throwing star it works great. His username should have a picture like this.
Step 5: Making The Notch in the pencil
I have got comments and I forgot to add how to make the notch. You simply take off the metal part near the eraser and get scissors and make a U shaped top on the eraser part. This should work