Another stop you will want to make while in Gatlinburg is the Ripley's 3-D Moving Theater. It has actually now been updated to 4-D! The kids enjoy rides and movies, so why not add the two together! The moving seats and #D glasses allow you to feel as though you are a part of the movie itself.
We watched the 4-D version of Happy Feet. Of course, you don't watch the entire movie - just a portion. You get to feel as though you are there, sliding on the ice and diving into the water. With snow actually coming at you and the feeling of sliding down the great hills of ice - it is a fun time.
The kids enjoyed it and could probably have sat through and entire full length 4-D movie if those were available.
There are of course various movie options and the choices will change periodically. So check out the listings and see if anything fits your tastes. It doesn't take too much of your time and is a thrilling little adventure for the kids.