No wonder it's called the common cold -- the average preschool and elementary child suffers between six and 10 colds per year. Cold symptoms -- including sore throat, runny nose, cough, sneezing, and fatigue -- can last for a few days to two weeks. Prevention. You can reduce their risk of cold by teaching them to wash their hands frequently with soap and warm water. Also, during cold seasons, remind them not to share food with their classmates or put their hands in their mouth. Treatment. While there's no cure for a cold, you can make your child more comfortable when they have one. Give her acetaminophen (like Infant Tylenol) for pain and plenty of fluids. Salt water gargles can ease a sore throat and steam helps clear congestion.