Spherify Object
Description
A Maya script that turns selected objects or vertices into spheres — either from each object's pivot or from the centroid of the selection.

Setup
The script needs numpy inside Maya's Python, which the bundled
prerequisite.bat installs for you: run it as administrator while Maya is
closed (first time only, needs an internet connection). After that, download
the .py script and run it from the editor or save it to a shelf.