The 2023 Gaza War has severely affected children’s health and development. This field-based synthesis draws from humanitarian agency reports and public health data to document impacts across physical health, nutrition, mental well-being, and education. Key findings include severe malnutrition, psychological trauma, and collapse of health care and education systems. Humanitarian access remains limited due to embedded military infrastructure and active conflict zones. Recommendations call for protected corridors, mobile health units, targeted mental health support, and stronger international accountability.