Any of the fantasyland rides are obviously better when the line is shorter (?sometimes) and / or keeps moving (Peter Pan, Pooh, Under the Sea, Belle's Enchanted Tales...), but I would also add to that obvious list, things like Jungle Cruise (if it's of interest to your family) as the line move slowly when the park is crowded...and Pirates of the Caribbean falls in that category for me as well. In HS, any of the TSL rides are better for kids when they don't have to wait too long. However, on the flip-side, I wouldn't FP rides like Dumbo as it has a GREAT play area for the kids and, frankly, the longer the line, the better for them to work off some of that energy in the play area. Hope you have a great trip!