Trauma can have devastating effects on the developing brains of children and adolescents. When children experience trauma, their developing brains are affected in ways that impact behavior, attachment, and development. Mental health professionals working with traumatized children must understand how trauma affects children, including how it impacts brain development, parental attachment, and behavioral symptoms. They also need interventions to help children build resilience and heal from trauma. Knowledge about childhood trauma will be crucial for counselors to effectively help traumatized clients and support their healthy development.