Protecting The Magic
There is one rule about working at Imagineering: You don't talk about working at Imagineering.
The stuff I did at Disney Imagineering R&D was excessively cool and as usual I learned a lot, but you're just going to have to take my word for it. If I showed how it works here, or even worse on Gizmodo, when your kids see Anna and Elsa at the park, they might not believe it's really them but rather a collection of motors and linkages.
It's called PROTECTING THE MAGIC.
(I didn't work on Anna and Elsa)