Honestly, I don't think we need one. The Mine Train is a classic and families in the area love it. I think that the Mine Train, the collection of kids flat rides, and the Log Flume are more than an adequate amount of things for kids to ride.
True, but the last family thing we have gotten other than the Tsunami Soaker was Pandemonium, and that ride is pretty scary for little kids. I could see them getting something like the Roadrunner Express, or even a wild mouse.