For those of you taking on snapology origami as a hobby, I thought you might be interested in one of the issues I've had with bigger projects.  It's something that doesn't crop up until your work sits around for awhile, which is sag.  It's amazing to see how the quality of paper can make a difference when it comes to larger projects, especially over time.  You start to see how the choice in cardstock can make a big difference. 

As an example, I have two of my Klein bottle pieces shown below.  In my prototype (red) I was trying to keep the weight down since the structure was fairly tall, so I used a thinner, lighter cardstock.  The other one (dark blue/silver) I used a much thicker, heavier cardstock.  Initially both Klein bottles came out okay, but over time the prototype has started to sag.  Between the thinner cardstock and, I'm guessing moisture absorption, the prototype didn't hold up well over time.

The moral of the story?  If it's a choice between lighter weight vs. stiffness, go with thicker, stiffer paper for large projects.  Either that or have a collection of saggy, listless models.

Wow!  I got to make an appearance on KUSI's Good Morning San Diego.  They heard about my winning art entry at the 2017 Bridges Art Exhibition and had me come in for a short interview with Jason Austell.  It was a fun experience!  Great people at KUSI.  In fact, my cameraperson was a Marshall Middle School alum, the school I teach at.  Talk about a small world. The only downside was that by the end of the interview Jason accidentally called me Richard, not David.  My friends are going to be calling me Richard for at least a month.

Here's the interview.
http://www.kusi.com/local-teacher-win-national-competition-mathematics-art/