I wrote an article and provided sample code about how Transform
implements IEnumerable
and described how you can use that to change materials on objects.
I wrote an article about creating a no-maintenance factory to generate random quests. The RandomQuestFactory (under Assets_Game\Scenes) scene provides an example implementation for you to review.
I needed a few test characters for a game I'm developing. I added the free Custom Character 2D Vol.1 package. I took the existing sample character and created two more.