For some time, child-proofing your tech meant using kid-specific login profiles to wall-off your progeny into the most harmless corners of your tablet. That's hardly a delicate or complex safety setup. Google has released an app, Family Link, that lets parents create dedicated accounts for their children. Want to toggle your kid's app permissions, limit their screen time and set a bedtime capping how late they can use their device? This one's for you.