Blunt abdominal trauma is common in pediatric trauma. This chapter discusses a child who presents to the emergency department with left upper quadrant pain after being struck by a motor vehicle. The point-of-care focused assessment with sonography for trauma (FAST) examination provides quick, reliable information on bleeding into the peritoneal, pericardial, and pleural spaces in the setting of trauma. The FAST exam is highly sensitive for identification of hemoperitoneum but is less accurate for ruling out hemoperitoneum and intra-abdominal injury. Discussion of the trauma evaluation and utility of the FAST examination in the context of pediatric blunt abdominal trauma is presented.