What is a good mmorpg game that includes a house system a pet system fishing mining ect and is for people under the age of 13

Well, there is no house system, but I recommend Mabinogi.
http://mabinogi.nexon.net/
:3
well there is also AdventureQuest worlds
there is a house and pet system there and its still new so lots of other skills can be available soon
you can make your account here
http://aq.com/aw-newuser.asp?refid=255232