It depends on a soul level.
We cannot expect a child to understand what we say from an adult perspective.
Example, when we say to a child that they cannot break an iPhone (just for understanding) because its expensive, a child does not understand what expensive means. They don't have the understanding of value, from a fiat perspective. We only understand fully when we are making our own and paying bills.
Children are very open and wise but we must explain to them everything In a simple way. I watch many parents say no, and adding, "It's No because I say so." Nothing else added, no explanations, no "connection". This is very shallow and empty, leading to confusion and stress to the little ones. But if you have patience to explain why, they do, majority of times, accept and go on like nothing happen. We have major responsability here in teaching that they are seen and valued. Humans need that.
I am not saying not to be authentic but to be aware. We never know how our words can negatively affect another.
Some people suffer from deep depression and we could be the trigger for attempting to self harm. I cannot not think about it.
Of course I am here being of extremes but, it's good to be aware and responsible for the energy we put out.
Some people are very skiled in masking how they feel.