A large part of the therapeutic work I do involves teaching young kids how to cope with intense feelings (i.e. anger, fear, etc.).
Young kids, as we all know (?.some of us by direct experience, wink wink) are prone to tantrums and/or meltdowns. One reason for this is that their young minds are not yet able to a) understand their emotions and b) express their emotions. As with developing abilities, preschoolers need help learning the skill known as emotional vocabulary.