This seems like one of the better character experiences that you can have at WDW. It'll be in the new Fantasyland, and I first saw it on Disney Parks Blog. Below is a video that will tell you what you need to know from Imagineers. Definitely looks like something that'd be perfect for your little princess. However, it does not seem at all accommodating to adults or guests who are teens, but that's not a problem for a lot of guests. Check it out here:
omnia mea mecum porto.
@byhardy on twitter.