I have 2 day 2 park tickets to Universal & IOA...we are also bringing 4 kids ages (4 months to 11 yrs). Yes, we are crazy, and traveling 18 hours to get there!! The more I have been reading on these boards, the more it sounds as though these parks aren't for little ones. Wondering how that works about visiting both parks in ONE day (they will only be open from 9-5 though)....Do you have to drive your car to the other park, or can you walk through this "city walk" I hear about? Confused?