Once was a crow. He was very thirsty and want to drank some water. He searches the water here and there but he didn't found water.
After some time he saw a garden. There was a pot of water. He saw that there was little water and his beak didn't reached the water. He thrown some pebbles in the pot. And the water rises up. He drank water and flew away
Moral - where there is a will , here is a way.