Hi, I have three children, 3, 7 and 8 and we have 1 day to goto either IOA or Universal. I am leaning towards IOA for Dr Seuss, Harry Potter and Spiderman. -Is IOA appropriate for my young family? -Is there enough to do to spend the entire day there for my family? I'm apprehensive to buy a park-to-park pass since I think that's too much to conquer in one day. Thanks much! PS. We plan on going Dec 18th to IOA or Universal.