Ask older children to add more descriptive details or vivid verbs to make their sentences sound even smarter. Prompt them to do this by providing choices such as: “Would you describe the temperature today as chilly or toasty?”
It is developmentally appropriate to expect younger children to answer questions with just one word or a short phrase. Accept their answers and then model using their answers in a complete sentence. With time, they will begin applying your model to their own language.