I think you would have been my favorite art teacher ever if I was in fifth grade. I was always doing stuff like this. Unfortunately I don't know if my fifth graders would ALL have the patience. Some would some wouldn't the ones that wouldn't are the behavior challenges, so I keep the peace.
This is one of my favorite lessons, though I haven't done them with the flap before. You might be surprised, Erica, this is one of those lessons where some of my behavior challenges do really well.