Thunderhawk is a flat ride in Americana at Worlds of Fun. While it's not the best, it is also recommended. The minimum height to ride is 54 inches.
A Huss Top Spin attraction with an added water element. Sit on the edges of the rows to avoid getting sprayed (or ride on cooler days when the water element is turned off).
Note: the water element has not been in operation at any time since the 2009 season. Apparently it is broken and repairs are not forthcoming.
This ride has a 77" maximum height.