"I always knew Santa Claus", boasted the (almost) five year old.
"Who? Tell me!", challenged the older one
"He's the guy who has a long beard and gives presents."
"Yes, but do you know who he is?"
"I just told you. He is the guy who gives presents at Christmas."
"See, you don't know", gloated the older one.
"Okay, then you tell me."
"Santa Claus is the father of Virgin Mary. Which makes his Jesus' Grandfather!"
Given the way Christmas is going, he might just be right.
A drabble is a story told in exactly 100 words.