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 Søstrene Grene's DIY Videos
by Origami Tsunami
by ALEX 3D ORIGAMI
by MP Channel
by happypuppytruffles
by Origami for Kids
by Paper Folds - Origami & Crafts !