Puzzling Plastic Polyhedra Thursday, 19th Mar, 2026 by Krilling for Company in Boredom, Mathematics, Polyhedra, Psychology and tagged polyhedra, icosahedron, icosahedra, puzzling plastic polyhedra, colorful plastic polyhedra, puzzles about polyhedra, plastic icosahedra | Leave a comment What are these plastic polyhedra for and why exactly do they take that shape? I didn’t have a clue when I first came across one. The answer is here.