Then the parents come back with "Well no, silly, that part was just a metaphor. 'Santa' isn't a literal person in one place, he's everywhere, all the time! He exists in a different way than we can comprehend things existing, so it's hard to explain, but he's still there, and he's the one who gives you presents."

"But mom, I saw you putting the presents under the tree."

"Well we did, yeah, but that's just because Santa works through us to show his power."