An Amish boy and his father were visiting 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 (never having seen an elevator) 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 wheel chair rolled up to the moving walls and pressed
 a button. The walls opened and the lady rolled between them and into
 a small room.  The walls closed and the boy and his father watched
 small circles of light with numbers above the  wall light up.  They
 continued to watch the circles light up in the reverse direction. 
 The walls opened up again and a beautiful 24 year old woman stepped
 out. The father said to his son,

 "Go get your Mother."