Invincible artist Ryan Ottley shares a pin-up of the Hulk he created for his four-year-old son with the only tools he had on hand -- "two big fat crayons and one pencil that was cinnamon scented, which was odd but pleasing at the same time." If you follow the link, you'll also see a page from Invincible 70, which probably wasn't created with a cinnamon-scented pencil.