A wifi router that blocks all websites except for those needed for kids to study when you need it, and there is no way to escape, not even with vpn or tor or wh

A wifi router that blocks all websites except for those needed for kids to study when you need it, and there is no way to escape, not even with vpn or tor or whatever, also with dashboard to show where they spent time on for how long. My middle school aged kids was able to escape with free proxy, vpn, tor etc in the past which forced me to figure out a way to lock it down totally when it's absolutely needed.