I explain in this tutorial how to create the Transforming, a.k.a. 8-pointed Paper Ninja Star or Shuriken, Moon and Sun, etc. It is a type of Modular Origami Model in which we will interlock or join 8 smaller Modular Units (pieces) to get a larger one.
All that is required is 8 small square sheets of paper. I am using 9cm x 9cm dimension paper I found in staples, but any Post-It notes should work fine. Smaller origami paper should work well also. If you want to use printer paper, that is fine (but you will wind up wasting a bit). Just make the printer paper into a square, like I do in my other origami tutorials. Then split that square into 4 pieces (fold in half both ways and cut/tear). Either that or you can use each sheet of converted printer paper as a modular unit and make a LARGE transforming ninja star!