HEY YOU THERE! There is a newer, better version right here → check out the V3

Edit: I made a new version where you insert magnets from the bottom. It has lines on the top that allow for smoother sliding that I saw in JamesThePrinter's slider, and they work great. Also added new sliders that go inwards instead of outwards if you'd like it that way.

I saw a magnetic slider on AliExpress with an astronomical price, so I decided to make one myself.

You'll need 9 8x3mm neodymium magnets for this fidget

Magnets should friction-fit into place, but if you can't get them to fit, just make the model larger by 1% (you may need glue to make them stay in place)