As for children, they are too little to know the world well like their parents. They just want to play and eat tasty snacks all day long. Though they go to school at a centain age, most of they don't know the purpose of studying. They don't have a clean aim for the future until they are respected by doing some things which are diffcult for others., then they realize the importance of being one part of the world. They begin to plan their life and academic that can help them become what thay want to be when they grow up, such as a doctor, a professor or a scientist. They try their best to discipline themselves. Playing with toys, watching TV or sleeping aren't their first choices. They fight against all the bad habits. Achieving a samll goal will usually inspire them to achieve more big goals. So, the most effective way to discipline a child is to let them know the menaing of being a person.Let them know that they are able to change the world and help other after growing up. Only having a aim, everything will centres around it until it comes ture.