An old king was about to pass away.
He called his three sons before his sickbed.
He gave each of them some coins and asked them to buy something to fill the room, whoever can fill the room the best will be declared his successor.
The eldest prince went to the market and bought a cart of straw. Despite his best effort, he only filled up a small quarter of the room. The king shook his head.
The middle prince went to the market and bought a large sack of flour. He threw the flour into the air in an attempt to fill the room with flour. The king nodded slightly.
The youngest prince went to the market and bought a candle. He lit the candle in the room and left the room quietly.
Soon the youngest prince was declared the successor of the old king, seeing as the old king and his two brothers died in a dust explosion.