His wife was out shopping.
It was raining and his son was bored and restless, with nothing to do.
The minister picked up an old magazine and flipped through until he saw a large, brightly colored picture of a world map. He tore the page from the magazine, and ripped it into small bits and threw them all over the floor.
He turned to his son and said, "Johnny, if you can put this all together, I'll give you $10."
This should keep his son occupied for a long while, he thought to himself as he walked back to the study room.
But within ten minutes there was a knock on his door. It was his son with the completed puzzle. The minister was amazed to see his son completed the map of the world so soon.
He turned to Johnny and asked, "How did you complete it so fast?"
"Oh, it was easy. On the other side there was a picture of a lady. I just put a piece of paper on the bottom, put the picture of the lady together, put a piece of paper on top, and then turned it over."