5. Daddy builds a Minecraft server PC and throws it on the LAN. 4 kids play together or alone in a server you control.
6. Daddy bought a relm subscription.. performance was way better then the 7 year old desktop plus they can now access it from grandpas house or on vacation and let their cousin & school friends join in. I still have control as it's a whitelisted server done by invite form me.
The kids now play on some of the public servers but I always play on them first to get a feel for the user base before handing over the url to the kid.