Also to add on to my previous message in hope you all keep this in mind, even if they are mature at 15, we still do silly things at that age. How many of us have done silly things on the internet we regret? Musically days etc… the tech world is getting worse where kids mature faster due to things being more exposed on every app theres no age restriction much on videos anymore. Definitely check up on your kids all the time when on their phones like their friends they have on there what are they watching doing, set rules for social media always say no to strangers online. You never know how easily people fake thier personality on the internet and seem there nice and trick your kids in thinking its okay to tell them their location and meet up. No phones in bed is also a good rule its not strict its good they should be getting good sleep during school and they might be tempted to do silly stuff at night. You never know. Just take your kids out often i would never like my kids have tech in there faces 24/7 its not good for their eyesight either.