When it comes to talking about one's children, there are several synonyms for the phrase "sons and daughters" that can be used. One common term is "offspring," which encompasses both male and female children. Another option is "progeny," which suggests a more technical or scientific tone. "Heirs" is another word that can be used to refer to a person's children and can suggest some sense of legacy or passing on of wealth or property. Additionally, "young ones," "kids," or simply "children" can also be used as synonyms for sons and daughters. Each of these words has its own nuances and connotations, but all convey the same basic idea of describing one's offspring.