I handed a letter to our four-year-old son as we stepped out the door. "Here you go, Buddy," I said, "You put this in the slot when we get to the mailbox."
He studied the stamp in the corner of the envelope. "Mommy?" he asked, "Is this a picture of Grandma?"
Our son thought for a moment longer and then continued, "Mommy? Is this a picture of Grandma when she was a mailman?"
I laughed and replied, "No silly. That's a picture of the queen."
"Oh!" he exclaimed as understanding dawned, "Is this a picture of the queen when she was a mailman?"