Once a lamb was grazing with a flock of sheep. Soon, she found some sweet grass on edge of cliff and got separated from flock. She was enjoying herself so much that she didn't even notice a wolf approaching her. As soon as wolf jumped to pounce on her, lamb noticed and quickly started pleading, "Please, please don't eat me."Wolf replied, "Why shouldn't I eat you.. you are my food, I will eat you."Lamb pleadingly replied, "I have just eaten grass. my stomach is full of grass and if you eat me now.. I will not taste good. if you wait for while, I will taste much better."Wolf thought that there was no way lamb could escape him now and agreed to wait. He sat down near lamb. After a while lamb said, "If you allow me to dance, grass in my stomach will be digested faster."Wolf agreed. Lamb had bell tied to its neck. Lamb started dancing but no one could hear bell. So, while dancing lamb had another idea and said, "Please, take bell from my neck and if you ring it as hard as you can then I will be able to dance even faster."Wolf wanted to eat lamb soon, so he didn't thought much and took bell from lamb's neck and started to ring it as hard as it can. Shepherd heard bell ringing and quickly sent his dogs to find missing lamb. Dogs found lamb and started barking loudly at wolf. Wolf got frightened and ran away. Lamb life was saved. 
Thinking clever can help gentle and weak to escape from fierce and strong. 