My sister and I are thinking about taking my children (boys 10+11) to disney for christmas. They've been to disney before, and love it, but I was wondering about universal/ioa. They hate rollercosters and larger scary rides, but love superhero characters. Would it be worth it for me or are the rides mainly too large or scary (the runaway railroad in disney is too scary for them - I don't know why I love rollercoasters)? Would one park be better for us than the other? If we don't go now, we could try in a year or two when the boys are older/more brave, it's more important that they enjoy themselves. Any advice?