Halloween temptations = Christmas decorations.
Nick Robinson's Modular Star.
Origami Stars here.

Paul Jackson's Star.
From The Ultimate Paper Craft and Origami Book.

Paolo Bascetta's Roulette.
From Amazing Origami.

Tomoko Fuse's Twinkling Stars.
From: Home Decorating with Origami

Spikey Star (front and back)
Origami Stars and Wreaths here

2D Ring by Carmen Sprung "Gundrun Star"	3D Ring by Michael LaFosse "Finger Pinswheel Puzzle"

	Platonic Solids: Tetrahedron Cube Octahedron Dodecahedron Icosahedron

Herman van Goubergen's Curler Units.
Modular origami diagrams here.

Hershey's 2-Piece Chocolate : Kasahara's 2-Piece Cube
From Amazing Origami.

Sonobe 12-unit Stellated Octahedron.
Standard (L) and reverse (R) assembly.
Modular origami diagrams here

Polyhedra Kits by Kawamura
from Polyhedron Origami for beginners

UFO by Robert Neale

Action Origami diagrams here

Sonobe 30-unit Stellated Icosahedron.
Modular origami diagrams here