On many occasions parents make mistakes and do not behave well with their children. The problem when this happens is that they forget to apologize to their children and pretend nothing happened. They act badly, they do not apologize to their children and therefore they do not take responsibility for their actions. You have to learn to change this.
If you want your children to learn to apologize and forgive themselves and others, you will have to be a good example of this in your day to day life. Apologies are not just 'sorry' or 'sorry' words. The offender needs to say why he is truly and heartfelt. You need to approach the child they have hurt, say why you are sorry, ask for forgiveness and then give him a hug, if for example the injured brother.
On top of that, after the other has forgiven you, they will have to behave well to continue in harmony. In this way, the bond between the two people will be working better, it is necessary for people, especially in a family, to learn to apologize from the heart and also to promote good social skills. This will help children for life because they will be aware of the importance of taking responsibility for their actions.
Children need to be taught to apologize for the little things that happen on a day-to-day basis, so they will be more willing to apologize and forgive when much bigger offenses occur when they grow up. If they don't learn to apologize voluntarily as children, they won't be good at apologizing as adults. Teaching them this valuable skill will help them to be able to mend their relationships when other types of situations occur. conflictive as they grow up, not only at home but in any other social context.