Playing Card Polyhedron created using instructions from George Hart…
Each “slide-together” is made from identical copies of a single type of regular polygon (e.g., just squares or just triangles) with slits cut at the proper locations. I make them from colored card stock, simply photocopying the templates onto the sheets. In most cases, glue or tape is not needed if you use a stiff stock. But you might want to use a small dot of glue at the corners or bit of scotch tape on the interior to fasten the components together. Having the corners meet crisply is the key to producing a neat geometric impression… (via)
