Learn how to create a modular origami icosahedron in this 15-minute tutorial. Master the art of folding triangular units from square paper sheets and assemble them into a regular polyhedron with 20 equilateral triangle faces. Follow step-by-step instructions for pre-creasing, simple connections, and squash fold techniques. Discover how to use these units to construct other platonic solids like tetrahedrons and octahedrons, or even create a D20 dice. Perfect for beginners, this guide provides clear demonstrations and tips for successful assembly, culminating in a beautiful finished icosahedron.