Just a try to give Fidget Spinner more sense ... :-)

...and to show my kids a little bit physics on a spinning wheel and how gyros work.

Diameter inner ring = 88 mm

You need to assembly:

2 x 624 bearing
4 x 686 bearing
2 x M4 x 16 mm screw
4 x M4 nut
2 x M6 x 20 mm screw
1 x M6 x 100mm thread rod
8 x M6 nut
(4 of them should be locking nuts)

Any kind of suitable Fidget spinner including a 608 bearing (8mm > 6mm spacer requierd).

Please feel free to improve or costumize it to your needs.
SketchUp Data is included.

Unfortunately Thingi doesn't allow to upload videos.
Would appreciate to show it in action.
Looks cool!