It was a scorching day, and a crow felt very thirsty. During his desperate search for water, he found an earthen pot lying on the ground. He looked inside and saw that it contained a little water. Overjoyed, the crow tried to drink it, but the water level was so low that his beak couldn't reach.
Disheartened, he was about to fly away when he noticed some pebbles lying nearby. Suddenly, he had an idea. One by one, he picked up the pebbles and dropped them into the pot. Gradually, the water rose to the brim, and the crow drank to his heart's content.
Necessity is the mother of invention.