The functions reflect types of communication found in children under five years of age. More sophisticated categories and descriptors can be used to describe the functions of the communication of children older than five. It will be important to consider if the child initiates the functions listed. The listing is not meant to be a comprehensive checklist for readers of this article. Instead it can provide the framework from which to work with others who are looking at expressive communication skills and provide guidance for observations by a variety of team and family members.