Excessive screen time before age five has been linked to slower growth of white-matter pathways in the developing brain. These pathways are essential for language, literacy, and cognitive processing, making their healthy development crucial during early childhood. MRI scans reviewed in a study published in JAMA Pediatrics show that children with higher screen exposure demonstrate reduced white-matter integrity. As a result, toddlers may face an increased risk of speech delays and difficulties in communication. The findings highlight the importance of mindful screen-use habits during the early years to support optimal brain development.