Want a custom 3D printed fidget spinner? Keep reading and find out how. Gather Your Supplies. 1. Bearings2. Filament of choice (I used red PLA) 3. A 3D printer (I used the Ultimaker 2+) 4. Fusion 360 or another computer program capable of 3D printing. Design Your Spinner, or Download My Desi... By: BikeHacker