You will learn to make three eight-piece flat modular origami models -- the first does not change shape but the next two are action models:
This sturdy wreath joins simple units with a nifty and secure lock. Each side is different but both only have rotational symmetry.
Octagram Slider (action model)
This is "Octagram Wreath" with a different location point. The sequence finds this point with a fold that is hidden in the final unit. This change allows the units to slide and change the model's shape. Both sides of the slider are appealing.
Magic Star: spiral version (action model)
This is a variation of Robert Neale’s classic "Pinwheel-Ring-Pinwheel" (also known as the "Magic Star"). Making one extra fold dramatically changes the appearance of one side. Neale’s units are stable when at least two are joined, but this spiral version is only stable when at least three units are joined.
If there is time, some variations and related models will be discussed.
Octagram Wreath and Octagram Slider will be published in “Star Origami: The Starrygami™ Galaxy of Modular Origami Stars, Rings and Wreaths” by Tung Ken Lam, CRC Press, September 22, 2021. ISBN: 9781032022338, pages 71 and 97, respectively. https://www.routledge.com/Star-Origami-The-Starrygami-Galaxy-of-Modular-...
Magic Star: spiral version was published in “Action Modular Origami to intrigue and delight” by Tung Ken Lam, Tarquin Group, 2018. ISBN 9781911093947, page 2. https://www.tarquingroup.com/books/ages-11-14/action-modular-origami-to-...
Paper colour: paper can be same colour both sides. If each side has different colours, duo paper may be preferred but is not necessary.
Paper weight: Standard 80 gsm printer / copy paper is fine. A convenient source is from square memo blocks. Origami paper will work as well.
Paper size for Magic Star (Spiral Version): 8 squares around 75 mm by 75 mm to 10 cm by 10 cm (3 to 4 inches).
Paper size for Octagram Wreath and Octagram Slider: Cut the squares into two 2:1 rectangles: you need eight for each model.
If there is extra time, more squares and silver rectangles may be needed for bonus models. Silver rectangles have a proportion of 1 to the square root of two. See https://origamiusa.org/thefold/article/ed-explores-silver-rectangles
A paper cutter would be useful (scissors, envelope opener, knife, etc).