This octagonal star comes from "Unfolding Mathematics with Unit Origami." It's a nice one to do with kids because the units and assembly are very easy. This star is also fun for kids because the units can slide outward so that the shape becomes an octagonal ring, just like a stop sign with a smaller octagonal hole punched in the middle. And here's a fun question from the instruction book: "Describe the rotational and reflection symmetries of the octagon star and the octagon ring. Are the symmetries the same or different? Explain."
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