Oxygen can be administered in several ways, depending on the child's condition and age: - Nasal cannula: This is commonly used for children who need a low to moderate level of oxygen. - Oxygen masks: Masks can deliver higher concentrations of oxygen and are used for more severe cases. - Mechanical ventilation: In critical cases, especially in neonatal intensive care units (NICU), ventilators may be used to deliver oxygen directly to the lungs.