Often the magical elements in my books are standing in for elements of the real world, the small and magical-in-their-own-right sorts of things that we take for granted and no longer pay attention to, like the bonds of friendship that entwine our own lives with those of other people and places. When one of my characters becomes aware of a magical element, it might be because the world is wider than we assume it to be, but it might also be a reminder to pay attention to what is here already, hidden only because it's been forgotten.