What - Mass casualty incidents (MCIs) involving children create complex, high-pressure environments that require rapid triage, coordinated patient movement, and adaptation by teams who may not routinely care for pediatric patients. So What - Hospitals, EMS, and healthcare partners must be prepared to manage pediatric surge during MCIs—especially during mass gatherings—using clear, actionable tools that support triage, treatment, communication, and coordination across systems, including for children with specialized needs. Now What - Use the curated resources below to support Just-in-Time (JIT) response, strengthen planning and exercises, and guide teams through pediatric-specific challenges during MCIs. Each link connects directly to an operational tool or template—no searching required.