If you are thinking of Fantasyland, your best bet is to get to the park at opening time. Get a FastPass for a popular ride (either Peter Pan or Winnie the Pooh) first thing, then go and get in the line for Dumbo. After Dumbo, ride the Carousel and then get in line for Winnie or Peter Pan - whichever one you don't have the FastPass for. After that, you'll be able to ride Small World, the teacups, and see Mickey's Philharmagic without much waiting, then you can ride your FastPass ride. You can usually do all of Fantasyland in about two to two and a half hours if you get there at opening. There's plenty to distract young children at that time of the day - they are still fresh and excited. Later, when crowds and lines biold, you can do things like the Tiki Birds, Country Bears, etc. that are less popular, less crowded, and air-conditioned. Have fun!!!