I think it depends on the kid. My son has read biographies on Walt Disney, but I don't think he is at a point where he has any kind of emotional connection, like my husband and I do.
I do have some Disney-loving friends with teens who are very much enchanted with the Disney mystique.
I just read this on Mousesavers:
Using Walt Disney World Tickets at Disneyland
Interesting, unpublished fact: you can use any unexpired, leftover days on a Walt Disney World ticket at Disneyland or DCA! Present the Disney World ticket at the gate on arrival -- they will take it somewhere, deduct a day from it, and give you a one-day Disneyland Park Hopper ticket. You can repeat this day by day until the Disney World ticket is used up. They will not give you a multi-day ticket all at once, even if you have multiple days left on your Disney World ticket. Also, MouseSavers.com reader Danny P notes that any Disneyland ticket obtained from exchanging a Walt Disney World ticket must be used on the same day it was exchanged.
This policy has been in effect for at least 5 years, and the information was last reconfirmed by a MouseSavers.com reader as of March 2009. Don't even bother calling Disneyland to ask about this -- the people answering the phone have no idea and they will tell you they don't take Disney World tickets.
Is anybody familiar with this? I'm wondering if we get 3-day play passes for WDW, would we be able to use them at Disneyland? It would be a gamble, since there's no way to know for sure if they would accept them. If not, we'd still be able to use them for WDW, but then we'd be left scrambling at the last minute for DL tickets.
I feel like I'm just scratching the surface of possibilities, here.
Another question - how many days would you recommend for DL/DCA, keeping in mind that we will have to take turns going on any rides not suitable for a 2 year old. I realize that several rides will be down, being January and all.