Disneyland. Also children 3and under are free
Disneyland is the best ticket to buy but it also depends on if your under 4 year old is 40 inches tall. It's 40 inches to ride most rides in either parks. So if their short California Adventure is best for them. To get the whole experience though both parks have to be done.
I think it's a parent decision. Right now there's a annual pass holder deal so if you know someone with a pass 99 park hopper. I like halloween and christmas but there will be crowds. In August they are bringing back the electrical parade
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