The Center for Inclusive Design and Engineering (CIDE) at University of Colorado Denver provides specialty assistive technology (AT) services to individuals of all ages, accessibility and usability consulting to business and organizations, and community oriented programs focusing on AT.
In this youtube video they share some great information about the usefulness and importance of evaluation for and provision of AAC to kiddos, even those younger than 3. Have a look and reach out if you are interested in a further evaluation of your kiddo’s needs.