A practical device by device playbook for parents to lock down YouTube, TikTok, Roblox, and web browsers across iPhone, Android, iPad, Windows, and Xbox in 48 hours. It uses a proven sprint plan with screenshots, checklists, and platform specific walkthroughs to set up parental controls, time limits, content filters, and bypass protections. It helps build age appropriate profiles, manage screen time without battles, and establish a simple monthly maintenance routine for lasting safety and calm.