Outline: A thirsty crow was looking for water it found a pitcher with little water at the bottom its beak did not reach the level of water then it began to drop pebbles into the pitcher the level of water was at last up the crow drank water.
Expanded Story: On a summer day, a thirsty crow was flying here and there in search of water. There was no water anywhere in sight. At last; the crow saw a pitcher lying nearby. But it had little water at the bottom.
The crow inserted its beak into it, but the level of water was so low that it did not reach there. The crow saw a heap of pebbles at a distance. Now it began to pick the pebbles by its beak and drop them, one by one, into the pitcher. In doing so, the level of water rose up.Now the crow was able to drink water from the pitcher and quenched its thirst.
Moral: Necessity is the mother of invention.