My oldest had an extra credit math assignment: construct a cuboctahedron
It is created with 6 squares and 8 equilateral triangles, sides being the same length as the sides of the squares. Each square is surrounded by 4 triangles, each triangle is surrounded by three squares.
Have a headache yet?
I helped her cut out the squares and triangles, pinned them for her, and she sewed it. Then she stuffed it and I whip stitched the last opening. We also embroidered her name on the ribbon, which is not visible in the photo.