... Here's an easy modular 8 point star (also called octagon star or Pinwheel-Ring-Pinwheel) made with 8 square papers, once folded it slides into place. I don't know who made it so credit it due. You can find the diagrams here:
by Origami VTL
by MP Channel
by Artistic Dolly
by danbergam
by DIY Manthan : HomeMade DIY Life
by Tadashi Mori
by Origami Things