Nowadays,the increasing of crime rates makes everyone worried because of the frighten of violence in people's minds .It is researched that most criminals  didn't shape the right attitudes toward moral characters when they were young.In order to avoid such tragedies,it is necessary for parents to help children shape the right impression about the moral characters .Doubtlessly,learning from mistakes is absolutely the most effective ways because of the deep impressions they bring .Thus ,leading children to make mistakes properly will be a necessary job for parents.It is known to us that we will acquire a deeper impression when experiencing by ourselves than to receive from teachers or parents .For instance,when I was young ,I had been taught for plenty of times the importance of honesty,but I didn't pay enough attention to it until I was criticized because of cheating in a exam.after that ,I seriously know the meaning of the honesty ,and I used this experience to restrict myself in the latter life.Despite of the experience of myself ,there are still many phenomenons indicating the importance of learning from mistakes,such the minds of some people don't grow paced with the body .When facing this situation,it can not be denied that their parents should be responsible for it owing to their over caring in kids'childhood.,so that their children didn't attain enough moral lessons experienced by themselves during their childhood.And when they grow up ,they will face the same problems in the real society ,at that time ,they fail and lose themselves in the society.Perhaps,the case concerning with Li Tianyi is the best example for us.But for the mistake children learning from ,parents should pay much attention to it and avoid their children to make such mistakes beyond the acceptable base line of moralities and criminals .From the opposite angle ,there are still something that children can learn without making mistakes such as the importance of getting along well with others that can be taught from teachers or parents .All in all ,it is meaningful for children to make mistakes and learn from it when they are young because of the deep impressions about moralities they can get.