One there was a brother who always pulled pranks on his sister. One day his sister told him that they were going on vacation. But the brother didn't listen, as she was elder. He believed she was trying to prank him back. But the next day, when he woke up, he saw everyone ready to go somewhere. When he ask his mom, she said,"We are going to go on vacation." But the boy was not ready and got scolded for being unprepared. 
Usually believe in what elders say. 