A boy and his father visiting from a third world country were at a mall.
They were amazed by almost everything they saw, but especially by two
shiny, silver walls that could move apart and back together again.
The boy asked his father, "What is this, Father?". The father responded,
"Son I have never seen anything like this in my life, I don't know what
it is!".
While the boy and his father were watching wide-eyed, an old lady in a
wheelchair rolled up to the moving walls and pressed a button. The walls
opened and the lady rolled between them into a small room. The walls closed
and the boy and his father watched small circles of lights with numbers
above the walls light up. They continued to watch the circles light up in
the reverse direction. The walls opened up again and a nice looking 24-year
old woman stepped out.
The father said to his son, "Go get your mother".