FamilyShield

OpenDNS has a free (I love free) service that can lock out adult content, malware and other bad stuff. Simple as changing your DNS addresses to 208.67.222.123 and 208.67.220.123.  I suggest doing that on your router so everyone gets the protection.

https://www.opendns.com/home-internet-security/parental-controls/opendns-familyshield/