Many play therapists intuitively use movement, rhythm, sensory experiences, and relationship to help children heal—but why do these interventions work? This introductory training explores the Neurosequential Model of Therapeutics (NMT), developed by Dr. Bruce Perry, as a framework for understanding the neuroscience behind effective play therapy. Participants will learn how trauma influences sequential brain development, why regulation must precede relationship and reasoning, and how to intentionally select play interventions that match a child's current neurodevelopmental needs. Through experiential learning, case studies, and hands-on activities, clinicians will leave with practical tools to integrate brain-informed, developmentally appropriate interventions into everyday play therapy practice. By the end of this training, participants will be able to: 1. Describe the core principles of the Neurosequential Model of Therapeutics (NMT) and explain how sequential brain development influences the impact of trauma and the healing process. 2. Differentiate the primary functions of the brainstem, diencephalon (midbrain), limbic system, and cortex, and identify developmentally appropriate play therapy interventions that support regulation, attachment, and higher-order functioning. 3. Apply the Neurosequential Model of Therapeutics to case conceptualization and treatment planning by selecting play therapy interventions using the sequence of Regulate, Relate, and Reason.