This is a video of physicist and origami artist Robert J. Lang explaining and teaching origami based on five different levels of difficulty, starting with child, then moving to teen, college student, graduate student, and expert. Are those actually logical skill levels to define? I mean I have a master’s degree that I’ll be paying for until I die, but that doesn’t mean I’m any more fit to understand paper folding than a teen or undergrad student. “He uses his diploma as a placemat.” Honey! “What?” I laminated it so Chef Boyardee cleans up easy.