Related: The Santa deception Is Santa real On the care of young rationalists
All of the other takes on this topic start from a point, when a child (usually 5-9 years old) asks "Is Santa real?" Nobody yet asked "how to raise my child Santa-free?" What to say, when a two-year-old, who just noticed that there is this character on TV asks "will he come to me, too?" A toddler may not yet understand the concept of lie, of pretending, of things not physically existing. How to tell her, what will happen, what to expect, how and why other children behave differently?
My three-year-old daughter discovered Santa last spring, which finally forced me to think: how to deal with it? Ignoring the thing worked for three years, but what now? I live in an extremely catholic country (Poland), so I cannot be completely blunt about it.
In the end I decided to call it "the fairy-tale of [Santa] Claus." For me it has a lot of advantages: this is a story that can be told, retold, reinvented and everybody knows it. In addition, since the name includes the phrase "the fairy-tale", it has just as much validity as the tale of the Red Riding Hood or any TV character that she likes.
I tested some of her beliefs about "Miko". I opened the box with books intended for gifts in front of her. When she wanted to read some of them, I explained that she cannot yet read her book, because she'll get it on Christmas Eve. She asked "is it from Miko?" and I replied that in some way it is, but I bought it. She didn't insist on reading it right now. A few days ago she helped me wrap some of the gifts. She commented that action "Miko brought these so we can wrap them and give them as gifts from Miko."
Malcolm told me, that he likes best the strategy, when you say that Santa Claus is a game that everyone plays. People pretend that there's a big guy in a suit who does the thing, and if you ever let down the pretense to your friends, you lose the game. I'm not entirely convinced by this strategy - it may be too complicated for a 2- or 3-year old (since my daughter didn't wrap her mind around the information that I bought the books).
What are other strategies that you use? Or which ones you don't like? Why?
The set of all statements does not neatly partition into Honest Statements of Fact Meant to Strengthen You Through Knowledge and Dishonest Lies Meant to Deceive and Weaken You.
People will tell you all sorts of things. Some of those things are trying to describe the real world, like a map or a science book does. Some of those things are stories. Some of them are songs or poetry. Some of them are analogies or metaphors.
And yes, sometimes people do tell lies so they can trick you, weaken you, or push you around. Figuring out whether that is going on is a really hard problem that a lot of adults can't solve consistently. People really do get tricked by con-artists, fake charities, medical quacks, and other liars. And that's not because the people who get tricked are stupid; it's because some people are really good at lying.
But stories, folktales, and myths aren't the same as malicious lies. They're not literally true, but that doesn't mean they're evil. We have to think about each particular story to tell whether we like what it says or not.
We know that characters in stories aren't real in the sense that books and houses are real. But if someone asks you whether Dorothy Gale is from Kansas or from Washington, you'd say she's from Kansas. If someone asks you if Anansi is smart or stupid, you would say Anansi is smart. If someone asks you if Harry Potter is a wizard or a muggle, you'd say he's a wizard. Even though you know that Dorothy is not a real girl, and that Anansi is not a real spider, and neither Harry Potter nor wizards are really real.
There are a lot of stories that try to teach you a lesson. Speaking of spiders, remember Peter Parker? "With great power comes great responsibility." That's a lesson that's still worth learning, even though Spider-Man is just pretend.
But there are other stories with lessons that aren't so great. There are stories that teach that everyone is alone and that nobody cares about anyone else. That's just not true. There are stories that teach that you should only care about people who agree with you on everything, and that everyone else is a horrible person who deserves to be tortured. That's a dumb idea that causes a lot of hurt in the world.
So when we look at a story, like the Santa Claus story, we can ask, "What good does this story do?" Does it tell us how people want to be kind and give each other things? Does it mess people up, by telling them that they have to accept gifts they don't want? Does it make people scared and guilty, or happily surprised?
Or ... a story might be good for one person and bad for another person. Or it might depend on how you tell it.
I think among all your examples, the Santa Claus story is unique in our society in that adults tell it to children with a completely straight face and actual intent to deceive. And they get angry at adults who tell children the truth about it. Or children who tell younger children the truth. Or sometimes even children who admit knowledge of the truth.
That seems very different to me from a typical myth or fable.
(Of course, I scope this to our society because one society's myth is another society's religion, so all these things are a bit relative.)