Congestion and runny nose are commonly seen in colds and allergies. Saline nasal drops or sprays can be used to thin mucus, making it easier to remove with a bulb syringe or nasal aspirator. Keeping the child well-hydrated and using a humidifier in their room can also help. For older children, decongestants might be an option, but should be used cautiously and under the guidance of a healthcare provider.