This was a great exercise for me.  It really helps me see geometric shapes in the faces/sides of the crumples.  It also helps accentuate shading and lighting.

I barely got started on the shading when we moved on to something else.  But Debra let me take some extra time to work on my shading, which is not really particularly evident.  This is not only due to the process of converting my drawing into this format!