A challenge for early childhood (EC) educators internationally is how to increase the integration of popular culture, media and digital technologies in EC settings to promote children's learning with digital media. But an ongoing puzzle is why the practices of some educators change, while others remain the same. Much research about teaching practice positions the locus of change in teacher beliefs, attitudes, values and knowledge. Re-mediation by cultural tools (i.e., concepts and artefacts) offers an alternative explanation, but this still does not consistently result in hoped-for shifts in practice. To gain further clarity, we investigated the idea of multimodal play as a 'threshold concept' for EC curriculum. Multimodal play integrates popular culture, media and digital technologies in ways that can promote children's learning. Considering multimodal play as a threshold concept may assist educators to adopt new practices in response to children's significant interest in and rapidly changing life worlds of popular culture, media and digital technologies.