Disney's been doing awesome work with "Living Characters", like a Mickey that moves his mouth or a BB-8 that can roll around. But for various reasons, they never tend to make it into regular usage.
If you have a few hours over Christmas break and want to watch a 4 hour YouTube video (I promise if you're on HN on a Sunday, you'll be delighted by it), I highly highly recommend this video:
"Disney's Living Characters: A Broken Promise" by Defunctland https://www.youtube.com/watch?v=NyIgV84fudM
I wouldn't risk a multi-million-dollar Olaf near a small kid who just wants to give their favorite character a hug.
Disney doesn't get enough credit for its innovation over the decades, from multi-plane cameras up to more recent inventions like smokeless fireworks (they donated the patent for this), their holotile floor (basically an endless VR room you can walk around) and more. They do a lot of R&D, and not everything is immediately ready or able to make it into a park.
ChrisArchitect•1h ago
Olaf: Bringing an Animated Character to Life in the Physical World
https://arxiv.org/abs/2512.16705
https://www.youtube.com/watch?v=-L8OFMTteOo