Was interesting to do in fusion 360. Works well with pla or a not so soft TPU,  enjoy..

I think humans will like it too :)

To brim or not to brim...that's the question! works np on my elegoo neptune 3 no brim. but i would put 3mm brim just for kicks and be safe.

No support. 

I would go with a good quality basic .2 or better. The ball will roll better the higher resolution. Obviously you will need to push the inner ball to break from its .8mm stem when printed.