This OpenSCAD script will generate a traditionally shaped spherical jingle/cat bell

A user can choose the radius, wall thickness, size of the rim and also if it has features such as a hole in the top or an internal ball and if the ball has a column beneath it for support.

Note:
Rendering this file with a large value for $fn will take quite a while. For the provided .SCAD file with $fn=100 it took about 20 minutes on a modern core i7 laptop.

To-do:
add option for 2 halves in side by side mode to make it more printable

1. Open .SCAD file and adjust values in "User Variables" Section to generate a .STL
2. Print .STL
3. Insert ball through hole on top, or if you printed one inside it ensure it is loose & snip the supporting column from the bottom of it if added.
4. Attach to collar, chain, reindeer, kitten etc.
5. Jingle all the way!