Once, there was a big pool in a dinosaur town. All the dinosaurs in the town would use the water of the pool to drink and for all other purposes too. That pool was full of small dino fish too. Once, a shrewd dinosaur decided to fish in the pool. He cast his net into the pool and sat on a side, very impatiently. Unable to wait, he tied a long string to a small stone. Then putting it into the pool, he began to stir the water in order to drive more catch into his net. A dinosaur saw him do so and asked him not to make the water muddy. But he wouldn’t listen and went on beating the water, making it dirty. The dinosaur brought some of his friends, and threatened him, “Either you live and let live, or we teach you to.” The dinosaur dropped everything and ran.