Dodecahedron pictured
Difficulty: 3 to 4, depending on model
Paper Type: Small square or 3x4 rectangle. Thin papers work better.
Sheets: Anywhere between 6 and 180.
Cuts/Glue: Optional
Time: Anywhere from 15 minutes to several hours
Source: Jim Plank's Origami Page
Instructions:
This model allows you to make a bunch of different polyhedrons from four different modules. A PDF of the directions for these can be found here.
I've made the tetrahedron and the dodecahedron so far, and I would argue that the smaller polyhedrons are harder to do because of the tight angles you have to assemble. I found post-it notes to be perfect for this project because they're readily available tiny squares of paper, and in converting them to 4x3 rectangles you can cut off the sticky part anyway. Another thing that helped me was using paper clips when assembling the polyhedrons, since I wasn't using glue at the time.
