A few minutes ago, my little niece came running past me and said, "I saw a ghost! I saw a ghost!"  She had just come from upstairs and then from the Living room.

I picked her up:

"What did you see? I didn't hear you." Just to be sure.
"A ghost. I saw a ghost."
"Where did you see it?"
"In the living room."
"Was the ghost a girl or a boy?'
"A boy."
"A little boy or a daddy?"
"A daddy."
"Was his hair light or dark?"
"It was white!"
"Did he speak to you?"
"No."
"What was he doing?"
"Standing there, looking."
"Could you take me to where he was?"

We go to the living room.

"There!" she said, pointing to the coffee table area where Mimi was standing.
"Was he smiling?"
"No."
"Well, there's no need to be afraid.  He was just visiting. Just saying, 'Hi.'"