Running is neither good nor bad. Running in the library is inappropriate. This terminology will always make sense. The Parent's Responsibility It is the parents' job to see that the every child experiences the consequences of his or her own behavior. When behavior and consequences are directly related, the child learns.
Parents can provide the means or the situation for teaching and learning to occur.
Parents must allow children to suffer consequences. Some consequences are natural and require little intervention on the part of the parent. If a child refuses to eat dinner, the child will be hungry by bedtime. If the parent allows the child to go to bed hungry, the child will have learned something about appropriate eating behavior. Playing in the street has its natural consequence, which is of course unacceptable.