Acting out is when someone is showing their emotions and feelings through their behavior. It's like when you are angry and you stomp your feet or throw something, that's acting out. Sometimes people act out because they are feeling sad, scared, or frustrated and they don't know how to express those emotions in a healthy way. It can also happen when someone is trying to get attention or trying to make a point. However, acting out in a negative way can hurt people's feelings and lead to consequences like getting in trouble or losing privileges. It's important to learn how to express feelings in a healthy way by using words, calming techniques, or seeking help from adults or professionals when needed.