I set up Nextdns for my parents to use for my younger siblings and it’s worked great. Others suggest pi hole but I’d say Nextdns free is enough for a kid or get the plan and use it yourself too for ad blocking out of the house. PiHole is too much work and maintenance for this task. You have to maintain blocklists, etc. And if you don’t have one, a raspberry pi is more expensive than many years of nextdns. Nextdns works outside the house easily for kids devices without the need for vpn setups which will be annoying to set up on children’s devices. Also has a whole feature set for easy parental controls. My two cents.
I set up Nextdns for my parents to use for my younger siblings and it’s worked great. Others suggest pi hole but I’d say Nextdns free is enough for a kid or get the plan and use it yourself too for ad blocking out of the house. PiHole is too much work and maintenance for this task. You have to maintain blocklists, etc. And if you don’t have one, a raspberry pi is more expensive than many years of nextdns. Nextdns works outside the house easily for kids devices without the need for vpn setups which will be annoying to set up on children’s devices. Also has a whole feature set for easy parental controls. My two cents.