Update 1: Designs 3 and 4 look cool but don't spin that well, so far 1, 2, and 5 seem to work pretty good on a semi-flat surface. Added Spinner 6 and currently printing it out and will update with how it worked.
So my 5 yo grandson loves my variant fidget spinners but likes crashing them into each other which resulted in breaking two of them (I have fixed them thanks to the $15 3D printing pen I got off of Ebay (best purchase ever)). So I figured if he liked spinning stuff on the table why not design some spinning tops on tinkercad, and these are the results. I printed out the first two and they worked pretty well, so currently printing out the last three.
I prefer the concentric support for these type of prints because they clean up a little better than other types. Could probably go with less infill but it was what i had already set up on the printer settings and didn't bother to adjust.