How does a fat man fit down a skinny chimney? How could one person deliver toys to every child in the world in just one night? For that matter, how do all those toys even fit in his sleigh? Hard questions to answer. But with a bit of Harry Potter-style magic, it just might all make sense.
Now, it’s totally possible that a wizard Santa Claus would have a flying sleigh and some kind of magical species of reindeer. After all, if broomsticks, magic carpets, and even cars can be enchanted to fly, surely a sleigh could, too. But a wizard Santa Claus wouldn’t need the flying sleigh, and I find it far more likely that he would simply travel by floo powder, hence why muggles claim to have spotted him sneaking in through the fireplace.
Undetectable Extension Charm
If Newt Scamander can fit a menagerie of magical creatures in a small suitcase, Santa Claus could surely carry toys for all the children of the world in his sack. All he would need is a little magic.
Even with an enchanted sack that’s larger than it appears, Santa Claus would still need one very important thing: time. Luckily, that’s something a wizard can have an unlimited supply of, as long as he has a time turner handy. But, you ask, how would Santa Claus keep from getting burned out and exhausted, just like Hermione? Simple: he uses the Time Turner only one night a year. After that, he takes a nice long nap and lives out his days in ordinary 24-hour cycles until the next Christmas Eve.
Who did you think was making all those toys? But there are other bits of evidence, too. House elves are good at going unnoticed and can travel anywhere by apparating, much like wizards. Perhaps Santa’s house elves do more than toy making for him: perhaps they also keep tabs on the children of the world and let Santa know who belongs on the nice list and who deserves coal in their stocking. They might even help with the deliveries on Christmas Eve night, reducing the number of times Santa has to use his time turner.
But how on earth has no one found Santa’s workshop yet? For the same reason no one’s found Hogwarts, Diagon Alley, or that field where the Quidditch World Cup was held. It’s specially enchanted to keep Muggles away. It’s also possible, of course, that Santa’s workshop is protected by a Fidelius charm, perhaps with Mrs. Claus as the Secret Keeper. It all depends how far Santa Claus is willing to go to keep his workshop hidden even from his fellow wizards.
What about his age?
Santa Claus has theoretically been delivering toys to children all around the world for generations, and an old man the whole time. Now, wizards tend to live longer than muggles anyway. Dumbledore and Grindelwald were both around 115 years old when they died, and not of old age. Bathilda Bagshot must have been even older, since she was already an adult when the Dumbledore siblings were children. Besides their already long lifespans, there are ways for wizards to extend their lives further, some living hundreds of years. I can’t see Santa Claus drinking unicorn blood or resorting to dark magic of the type Voldemort uses, so I’m guessing he’s using a sorcerer’s stone to create elixir of life.