For a child under 2 years old with a sore throat, it is recommended to keep them hydrated by offering fluids frequently. Using a straw or cup can make it easier for them to drink. Adding honey or lemon to the liquids may also help. Pain relievers like acetaminophen or ibuprofen can provide relief if needed. Avoid giving throat lozenges to children under 4 years old, as they may choke. Additionally, cold and flu syrups are not recommended for children under 6 years old. If you have any further questions, feel free to reach out to a healthcare professional.