Augmentative and alternative communication (AAC) technologies offer the potential to provide children who have complex communication needs with access to the magic and power of communication. This paper is intended to (a) summarize the research related to AAC technologies for young children who have complex communication needs; and (b) define priorities for future research to improve AAC technologies and interventions for children with complex communication needs. With the realization of improved AAC technologies, young children with complex communication needs will have better tools to maximize their development of communication, language, and literacy skills, and attain their full potential.