I received this question over and over in many forms, so this must be a fairly common problem. Generally one child will begin to instruct everyone else, including Mom and Dad when they are becoming “Wise in their own eyes.” What I mean by that is that they feel superior and more important than others. Often this starts out rather innocently, and we as parents actually encourage it. it is a relief to us when big sister can help the younger children tie their shoes, make their beds, etc. When it become an annoyance is when we are trying to instruct on some basic matter and they chime in, add on, or even interrupt to “gang up” on a little one to add their own voice of authority into the situation. This is not uncommon. In our home we have a few pat phrases that we use to bring it to the attention of the child such as: “You are not the “other mother.” or “I will give the instructions. You are not her authority.”