Picture of a bird
"Son, what are you doing?" asked his father to the boy.
"My mother loved seeing a bird, so I want to show this picture to my mother who might be watching us from heaven. And also I want to show her that we are doing OK here in this world"
After a long silence, the father said to his son:
"The picture you are drawing is too small for your mother to observe it from heaven. Son, I will help you draw the picture big enough, so that your mother could see it from heaven"
And the next day, the father started digging on the ground and everyone in the village thought he was constructing a road.
When he explained what he was doing, all of the people in the village started helping him draw a huge picture on the plain; because his wife was loved by the people.
It took many months to finish the huge drawing.
When the drawing was finished, it was so large that nobody was able to see it.
Although the boy himself could not see the bird drawn on the plain, he was sure that his mother is feeling relieved to know that her husband and her son are doing OK.
2000 years later, the huge picture drawn on the plain is called the Nazca Lines.