There were two little ducks, Quick and Quack. The two were brothers and they lived with their mother. These two little ducks always competed against each other.
One day, when they came home after visiting their uncle, they saw a river. They decided to have a race and who could go across the river first would win the race. The two ducks swam quickly down to the river. Both of them knew the way very well, but Quack wanted to try a quicker way. He knew that currents（水流） in the middle of the river were faster and that they would help him win. However, their mother had told them never to swim in the middle of a river. Quack thought about it for a few seconds, but he finally decided to try it. "I'm old enough now to swim there," he thought. Quick also knew about the currents. But he always followed his mother's words. And he followed his mother's words this time, too.
It didn't take Quack much time to be the faster one. However, as he went on, the currents in the middle of the river became stronger and stronger. Suddenly, Quack was caught by a big whirlpool（漩涡）. He was not strong enough to escape from it.
Fortunately, a cow passed by and saved him. After that, Quack realized that his mother's words were good, even though sometimes he didn't want to listen to them. And he decided to follow his mother's words from then on.
