The mother of the family that I work for recently related the following conversation that her five-year-old son had with a woman who was meeting him for the first time:
"Who lives at your house?"
"Daddy, Mommy, [Brother], [Sister], and Anna."
"How many brothers and sisters do you have?"
"What are their names?"
"[Brother], [Sister], and Anna."
"How old are your brothers and sisters?"
"[Brother] is seven and [Sister] is four."
"How old is Anna?"
"I don't know. She's really old!"