The file 'Ball-in-cage 3D Printer Model' is (stl) file type, size is 1.8KB.
I thought it might be cool to have a ball encased in an object, so I designed this. It is relatively simple and can be printed with low resolution. Just pause it half way through, drop the marble in, and finish printing. My marble is approximately 16 mm in diameter.
ball-in-cage.stl | 22.3KB |