So the church lady was visiting in another town and helping out in the kiddie section. A little girl tugged at her skirt and said "Will you remember me?" She assured her that she would.
A little later the same girl came back and said "Will you remember me next week?" Well, this was sounding serious, but she didn't panic, she just chatted for a while ad promised to look for her when she came back next week.
So the little girl came again and asked "Will you remember me next month?" The lady was almost panicky now, trying to figure out how to minister to this little person. She said "Well, why don't you write down your name and address and I will send you a letter next month, since I won't be in this town then."
That seemed to satisfy the little girl. But soon she was tugging at the lady's skirt again. "Knock knock," she said. "Oh," thought the lady, "Something normal!" She happily said "Who's there?"