Step 1: You Will Need...
Step 2: The Basics
Step 2: fold your post-its in half the other way.
Step 3: fold your post-its so they make a triangle.
Step 4: Ditto, except the other way.
Step 5: Cut in four places.
Step 3: Taking Shape
Step 7: repeat on all sides.
Step 8: (Optional) cut either a square hole or a circle hole in the middle of the stars. As you can see, the shuriken, hence the title, is taking shape.
Step 9: place one side of the shuriken in the other. fold the flaps over and tape.
Step 10: repeat on all sides.