Take 66 acres resembling a failed ski resort, add a snow-capped Mount Gushmore, sprinkle some pixie dust and enjoy endless thrills at one of two Walt Disney World Resort water parks. Older kids will love the 120-foot-tall Summit Plummet waterslide, which drops riders 350 feet at speeds of up to 55 mph. From the Tike’s Peak toddler play area to the world’s longest multipassenger whitewater raft ride, there’s an attraction for every member of the family.