Created a dual extrusion spinner but felt bad for everyone who does not have dual extrusion capabilities. Enter the modular tri spinner. Print one of the bottoms and one of the tops in any color you want. Then print 2 of the middle ones each in their own color. Voila, you have a multi color tri spinner.

Currently I have been touching the 4 parts with a soldering iron to fuse them. The bearing holds the center really well. I heat the bearing with a heat gun so it slides in easier. It is a snug fit. Wear gloves if you do that because the bearings to heat up really quick.

https://youtu.be/IdIqoV1Paow

Have fun and stay focused. =)