I learned how to make cranes in 4th grade. We all gathered around during a cold or rainy recess and started folding away. (We also used to play Uno during recess if we were inside.) I remember going home and trying to show my mom, but I kept forgetting one crucial step, so I my origami birds looked weird and sloppy. I probably ended up crying. But I was very determined; eventually I memorized each fold (when I say "eventually," I really mean "the very next day").