This is a fun little critter that 8ran has made. All it lacked was a magnetic personality so it could stick to the fridge.
My TinkerCAD file ....
The magnets are 6x2mm.
A bit if SuperGlue in the hole, press the magnet in and wait for it to dry.
The magnet hole may be a little large but the slug can be scaled to change that if needed.
As in the original design comments, you can use 100% infill if you want a better weight.
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