Language learning practices are shaped by their material conditions. Using an action research case study intervention, this chapter shows how the introduction of mobile video chats for children learning a home language creates the material conditions for language engagement and participation practice to emerge that encourage the learning of the home language in additional contexts. The mobile video chat's concomitant role in enacting change in the children's home language learning practices facilitates home language learning in authentic and meaningful interactions. The material characteristics of the microphone, the web-camera, the loudspeaker, Skype and the portability of the tablet together with the material characteristics of their physical environment have the potential to enact change in children's additional language learning through listening, seeing, speaking, moving, and showing in virtual interaction with a grandparent as adult conversational partner.