Here some types of small motorize vehicles can be used by persons under 16. Of course, they have built-in speed limiters.
What if we had this kind of distinction for mobile devices with Internet access? Adult's smartphone vs kid's smartphone?
It could be some sort of combo of a specific "for kids" SIM card (with, say, DNS blocking at ISP level and/or date of birth of the user) and a "kids hardened" OS that prevent bypasses and the parental monitoring tools you mention. The OS (in a wide sense, that could extend to the browser and other mission-critical programs) could be certified by some national agency; commercial products have to pay for the test, FLOSS projects could tested for free on request.
What if we had this kind of distinction for mobile devices with Internet access? Adult's smartphone vs kid's smartphone?
It could be some sort of combo of a specific "for kids" SIM card (with, say, DNS blocking at ISP level and/or date of birth of the user) and a "kids hardened" OS that prevent bypasses and the parental monitoring tools you mention. The OS (in a wide sense, that could extend to the browser and other mission-critical programs) could be certified by some national agency; commercial products have to pay for the test, FLOSS projects could tested for free on request.