All emotions are legitimate and normal. Children need to feel, experience and experience them in order to process and learn how to manage them.
To help them on this path, we must know how to recognize both our emotions and those of our children. You need to observe and understand what is going on before giving an answer. It is also important to be able to put into words what they are feeling at that moment (“you are angry”, “you are scared”, “you like it a lot” ...) and so we will give them models of regulation and management of their emotions and feelings.