The best way to prevent the cold and flu in toddlers is to wash their hands regularly and to teach them basic hand-washing techniques. In addition to this, it is a good idea to stay away from anyone exhibiting cold and flu symptoms and to avoid sharing utensils, towels, and cups. While it is not easy when your toddler is fighting the cold or flu, rest assured knowing that they will feel better in a week or two, after which they will be back to their normal, playful self.