STEPS:
Open Minecraft on the device of your choice. Typically, this is on xbox or may be downloaded on a Mac or PC or perhaps an iPad with a registered account. NOTE: If you don't see the option for "Multiplayer" then unfortunately you cannot join.
Click Multiplayer, then click "Direct Connect"
Enter the following address:
play.coopersrealm.com
Press Join Server.
That's it. You will land in private world with only those that have been invited.
Safety Notes: This is the actual box the kids will be accessing. It lives in our house, and is protected by a firewall, and we will be monitoring all users that are added.
This site is not indexed by search engines, so only those with the URL know to access it.