Research
Every source I quote, in one place. If I say it in a video, the evidence is here, linked to the original.
Young children and screens
World Health Organization: guidelines on physical activity, sedentary behaviour and sleep for children under 5
No screen time for under-1s or 1-year-olds; no more than 1 hour a day for 2 to 4-year-olds, and less is better.
Teens and social media
US Surgeon General: Advisory on Social Media and Youth Mental Health
Teens spending more than 3 hours a day on social media face double the risk of depression and anxiety symptoms.
Laws around the world
Australia's under-16 social media ban: eSafety's three-month findings
Three months in, 81% of under-16s still had access to at least one restricted platform; about half kept accounts because their age was never checked.
Parents say enforcing the ban is being left to them
Families describe workarounds, including apps re-downloaded through iCloud without permission.