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 wheel chair 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.
Then 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 beautiful 24 year old woman stepped out.
The father said to his son, "Go get your Mother."
Author Unknown