The boy is fascinated with fires as little boys typically are. And he loves marshmallows, though not the cooked kind. But that fact doesn't stop him from "toast-roasting" them for everyone else, whenever there is a campfire or a bonfire.
This is a recent pastel drawing of the boy eating an un-toast-roasted marshmallow while keeping warm by his grandparents turkish firepit... mmm... I'm hungry!