We have a bulletin board that also doubles as a place to keep things cold. I had purchased 40 magnets (20x10x5) and was looking for a place to use some of them. Voila!
Using .2mm layer height on the Prusa Slicer, I put a pause to include the magnet at layer 31. I use a dab of glue when inserting the magnet, but I think the proximity of the metal bed to the entire magnet may make this a moot point as the magnet has serious holding ability. (I'm a bit poultry, if you get my drift.) Color changes are optional.
The author marked this model as their own original creation.