Building Engagement and Early Communication is designed for SLPs and other EI practitioners working with infants and toddlers whose disabilities impact communication development. A key preverbal communication milestone is triadic focus gaze, when a child begins shifting gaze back and forth between an adult and another object of interest. Triadic Gaze Intervention (TGI), as discussed in this practical resource, supports development of triadic gaze and related communication behaviors and can be implemented within everyday routines.