... 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 TheHorseofThunder
by enjoy paper! origami tutorials
by All About Easy Craft Ideas
by Jacky Chan
by COOL Crafts
by Jo Nakashima
by Jenny W. Chan - Origami Tree