We took the girls to Hong Kong Disney last December. Stayed at a Disney themed hotel and were there for two nights, with two days to do Disneyland. The girls were 3.5 and 4.5. DD2 is barely 90cm tall. We could have easily gone back for another day and still not satisfied the girls in what they did/saw.

There were a couple of rides in Toy Story land that they couldn't go on (and TBH looking at them who would WANT to go on them - scary!!), as well as a rollercoaster thing in Tomorrowland. Otherwise everything was available to them at their height/age. What was beneficial was that DH could go on all the rides I couldn't with both girls together so nobody missed out or had to go through double waiting time. The staff made an enormous fuss of the kids everywhere we went and they had an absolute ball. I was concerned the waiting times in lines would be too much for them at their age but they were fine with it.

Benefit of staying at the Disney hotel was that we went back each afternoon for a rest so we got the most out of it, with free shuttle buses running constantly and frequently - never had to wait more than 5 minutes to get on and go.

Disneyland LA has more rides that would certainly include some exclusions for your kids (Indiana Jones and Splash Mountain the only two I can remember) but we were tossing up LA or HK and I was surprised that even with the "bigger" rides, there were still only a handful that the girls would have been too small for. Have a look at the LA website and there is a section somewhere that gives you all the height restrictions so you know what you're looking at.

I honestly couldn't recommend it highly enough, and at their young ages everything is just so magical for them. All four of us had a fantastic time there and the girls are dying to go back.