Export an animated 3D model to Power Point As you might have seen, it is now possible to insert an animated 3d object, like a walking T-Rex, into PowerPoint. 



See for example: https://support.office.com/en-us/article/insert-animated-3d-graphics-6f08009a-3da5-400d-a706-8e23f304cd72

Now, I am wondering, how can I create custom 3d models for powerpoint that would also have embedded animations like the T-rex has? 

I have not found anything on the web so far. Most of the topics discuss how to create static 3d models for PP, but not how to create 3D models with embedded "scenes" or pre-set animations. Any help would be highly appreciated.
Take a look at here for a quick overview and at the 3D Content Guidelines for Microsoft powerpoint for details.  As the 3D engine in Powerpoint is now based off Babylon.js GLTF format is your best bet to get content to import correctly.