Magic rings or "Umulus rectangulum": 6 pieces made with half of an A4 paper. Made by Thoki Yenn. You can find the diagrams here: ...
by Soren Salm
by colour n fun
by Origami for Kids
by JM's Origami Tutorials
by Paperfold Oriart
by happyfolding.com - enjoy origami
by Mahak art and craft