This mini-ethnographic case study examined the enactment of the mother tongue (MT) medium of instruction policy in teaching information and communication technology (ICT) to preschoolers or early childhood development (ECD) learners in a Zimbabwean school. The study employed an eclectic cognitive sense-making, ethnography of language policy and planning (ELPP), and technological, pedagogical, and content knowledge (TPACK) framework to look into practices of one preschool teacher, Mrs K, in her quest to enact the mother tongue policy. Despite her 26 years of experience in teaching preschoolers, Mrs K had not received adequate training on teaching ICT, a new subject in the ECD curriculum. While at first glance, she appeared to be abiding by the policy, some of her lessons proved to be teacher-dominated, and the classroom dialogue formulaic thus undermining the all-pervading learner-centred pedagogy on which the new curriculum edifice was premised. The paper thus explores the complex interplay of knowledge of content, technology and pedagogy; experience; cognitive and other contextual factors in impacting teacher sense-making and enactment of the mother tongue policy in teaching ICT to pre-school learners. One major factor which appeared to be influencing teacher understanding of policy was lack of ICT content knowledge and knowledge of how to teach ICT using both English and MT. The policy reformers seemingly rushed to implement the curriculum without capacitating teachers on how to use the mother tongue to teach ICT at ECD level. The study thus proposes strategies for teacher professional development in ICT, particularly for resource-constrained environments.