Click these 3D objects. There are 3 of them. Ground is not in the list. Sphere and box clicking will fire modal window with different posts - wobble ball for the sphere and tic-tac-toe for the box.
The plain HTML version in here - https://igiuk.com/3d-utilities/modals/
There is only one HTML file, so you can just copy-paste the code (Ctrl+U in Chrome to view source) and it will work.
The source code is heavily commented and consoled.