One of the themes you might like to consider is the unbridgeable gap between the worlds of adults and children. They inhabit parallel universes, each with their own distinct code of values and priorities. When adults at the bazaar start getting drunk on a potent brew called "Hangman's Blood," the children are puzzled by the sudden change in behavior this causes: the slurred speech, the change in their tone of voice, the candid facial expressions, which conceal just as much as they reveal.
What really separates adults from children in the story, however, is their respective understandings of time. The Bas-Thornton children live exclusively in the present; the future is utterly fantastical to them. When the savage storm destroys their parents's house, it also creates an Edenic paradise for the children—a playground full of fun and excitement. Their father, however, must look to the future and figure out how he's going to organize his family's life now that their home has been destroyed.