Kenzie really wanted to try a roller coaster when we were visiting the theme parks in FL. The Shamu Express at Seaworld promised to be a "just-thrilling-enough first coaster." It was just as fast as any adult-sized coaster, I learned after our ride. It was short, though, and that was probably the only saving grace for McKenzie. Watch as her face goes through various stages of terror.
After the ride, Susan asked her if she'd like to do it again. Her answer was a resounding, "NO WAY!"