Well, it's comforting to see that Crayola company made it through Armageddon, notice the open box of crayons.
Maybe the supply of crayons will run out eventually, and what will the WT do? Make more? Will people make their own?
Will there be a New World Crayola Co. Inc.? And how about the paper for art drawing? Will they use papyrus eventually?
Definitely not vellum... or maybe so if you wait around for an old sheep or goat to die and use their hide for vellum paper.
Hmmm... Maybe use slate and chalk eventually, or maybe perfect brains will develop new ways of making art sketches.