I'm about to fly in the face of the whole purpose of an Older Gamer community with this next post.
If you've not tried it yet, go and download

.
I went to check it out one day just so I could have a simple MMO to play with my sons (9 and 6). Now I'm hooked completely. Fire, Ice, Myth, Balance... Life, Storm, even Death. Pick your wizard's primary school and have a blast right out of the gate.
Wizard 101 is the unsung hero of free MMOs in this gamer's opinion. I've played several others as well as tons of pay-to-plays (WoW CoH/V, AC, DAoC, WAR..etc etc)
This one's free to play forever, but you can only access high level content and do things like ranked duels if you're a subscriber.
It's probably free for only one reason: so you'll play it and then eventually become a subscriber... and you probably will. This game is amazing. Even subscriptions are cheap ($60 for a year)
I cannot speak highly enough of this game.
If you are burned out on the time consuming MMORPGs, want something you can jump into and have a blast whether for 30 minutes or 8 hours then this is worth checking out.
It's very kid friendly but anyone of any age would enjoy playing it and there's actually a large population of adult players. In order to keep it kid friendly it runs into one of it's limiting factors: open chat. It's difficult to communicate in game.
Ventrillo helps us in the TOG world, but it still has a very good commo point/click system for kids so they can still interact and enjoy playing with others.
Whatever TOG'rs out there play this game, please PM me here. My main is a 36 Life Wizard.
I'm happy to team up with anyone that's questing. I'm also looking for arena dueling partners in 2v2, 3v3 and 4v4 for the near future.
Thanks for creating this thread! And give it a shot. You won't believe that a "kids" game could be more enjoyable than the WoWs out there.
Cheers,
~ Zav