Invite Friends Over
From Webkinz Insider Wiki
To invite a friend over, you must first turn on your KinzPhone. Once your phone has been turned on, check to see if your friend is online. If they are, click their name, and click invite.
If they choose to accept your invitation, you will hear a doorbell sound, and your friend's pet will appear in your room. From this point, you will not be able to move items into, out of, or around your room, until your friend leaves.
However, you can feed your pet, although you cannot feed your friend's pet. You and your friend can also cook and watch television in a shared window.
If you own a slower computer, it is probably best to stay in one room, as changing rooms can cause errors in slower computers.