A sphere that you can modify to be a bowl, a ring, a bracelet, a wheel, a decorative lantern with LEDs inside.
Several tools provided, with very few limitations. It is probably easier to make a mistake rather than print what you want, so be careful.
Make the sphere, hollow it out, slice off the top and bottom, add a base. If you make a solid object like a wheel, you might want to control the axle diameter, otherwise leave it at zero.

I'm fairly new to OpenSCAD, so if anyone can tell me why the difference () function doesn't work correctly, it would be appreciated. At many angles and sizes it shows the original sphere without the subtractions, in others it makes the body invisible when it should be there.
Perhaps I am doing something wrong?