This book is adapted from the same name fable in ancient Greek Aesop's Fables. It tells that a thirsty crow finds a water bottle near the dry well and there is very little water in the bottle which has a thin bottleneck, so the crow can't drink water. The crow sees there are many pebbles on the ground and suddenly comes up with a good idea. It picks up pebbles with the mouth and puts them into the water to rise the water level to the bottleneck, finally drinks the water. This story tells that once you have a scientific mind, you can adapt yourself to changing circumstances and solve the difficulties.