Background: This study investigates the relationship between maternal education, media usage, and their combined impact on child development in low and middle-income countries. Methods: By analyzing data from the UNICEF Multiple Indicator Cluster Surveys (MICS) across multiple nations, the aim of the paper is to observe these interactions on a broad scale. Relevant indicators from the MICS were selected to assess child development, maternal education, and media usage. Results: A linear model with interaction has been built to explore the moderator effect of maternal education in the relationship between media usage and ECDI (early child development index). For a better understanding of this interaction, the study has also explored the correlation between media usage and ECDI for each level of maternal education. Conclusions: Through these analyses, the interplay between these variables resulted complex and not trivial; different media have different impacts on ECDI, in particular for different levels of mother education.