I'd second the Tortilla Joe's suggestion... booked in next Wednesday
We also like Rancho de zocalo by BTMR (one vegetarian in the family...)
Remember there are meal+ show deals too. It's possible WOC might be on during your dates, or Frozen, in which case you can buy a lunch or dinner deal from particular restaurants which includes preferred viewing. If you are buying a park meal it makes sense to me to pick up this benefit. You can find them in the Disney dining options.
Also remember character dining. Your kids are older than ours were when we first started going to the parks but even as young teens they still enjoyed the atmosphere.
Now... Santa Monica tips. Depending on when you arrive and leave you have quite a few days there. It's relatively small and walkable area, although NZers are sometimes taken aback by the numbers of homeless there.(not that we've solved that.....) I'd suggest
- hiring bikes and riding along the beach in either direction: to Venice is easy, or further towards Malibu. Or you can just walk. (good to do if you are on the earlier Air NZ flight and have a spare afternoon) Muscle beach is always fun.
- You can also walk along Abbott Kinney in Venice and check out the shops, restaurants and food trucks!.
- Hitting the pier rides (probably an hour or two with the age group you have) Again fun on the first day.
- Shopping on 3rd st... it's a pedestrian mall, anchored with department stores at one end. Pretty much all the brand names are represented.
- You can do universal from SM. Funnily enough it will take only a little less time than a quick trip to Disney! Allow 40min to 1 hour to get there.Def quicker than from Anaheim to universal. A day is plenty there, but go early.
- I'd tend to stay away from a highlights tour, just because of the amount of driving involved ( or at least opt for one that doesn't spend too mch time getting between sights) and opt for doing things instead. Hollywood itself is not much to see, and you can do the walk of stars etc in a very short time! Again you could uber there and then go to the Grove shops if that's your thing. But Sunset Boulevard/Beverley Hills are nice to drive through.
- One thing that is fun is the Warner Bros tour, which actually takes you through working studio sets. I think your kids are all old enough (they have an age range limit)
- Also within reach are the Getty museums... one is about 15 mins away, the other is in Malibu.
- eating wise, there are loads of family friendly places in SM. You'll have no trouble finding them.
The only thing I'd flag is the weather. It could be absolutely beautiful or it might be a bit gloomy and cold, especially at night. Make sure you throw in a sweatshirt and jeans, maybe the trusty Kathmandu puffer, just in case!