Magnetic Fidget Slider
Uses total of 12 6x3mm magnets, 6 for each side.
I recommend N52 magnets for a stronger snap.
Printing:
0.2mm layer height for the housing
0.1mm layer heigt for the top plate for better quality, otherwise 0.2mm as well
no supports needed
Assembly:
Glue the magnets to the housing, then glue the top plate on.
Repeat for other half of the slider, minding the magnets polarity.
Bigger Version here:
https://makerworld.com/en/models/405695