**5. Conclusions**

The majority of caregivers reported that whilst MDU was convenient for communication, personal organisation and security, it was an unwanted distraction in the playground, where supervising and interacting with children should be the priority. However, the exception was the camera, which was highly valued by caregivers for making memories and also o ffered the most support for maintaining supervision and interaction through play. Mobile device use was found to contribute to reduced supervision of children, which is a risk factor for injury. This is an emerging area of injury prevention that indicates the need for broader strategies addressing the complex interplay that exists between the social determinants and the developmental younger years. Finally, the caregiver perspectives from this research are valuable for the development of realistic and e ffective strategies that support parents and caregivers to achieve their desired MDU.

**Author Contributions:** J.J. and J.E.L. conceived the research design and K.B. participated in design and coordination. K.B. collected, cleaned and analysed the data and drafted the manuscript. J.J. and J.E.L. were responsible for initial coding, critically revising the manuscript, editing and providing guidance on the manuscript. K.B., J.J. and J.E.L. read and approved the final paper. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** We would like to thank the participants of the study.

**Conflicts of Interest:** The authors declare no conflict of interest.
