Fridge Magnets / Whiteboard Magnets
These are easy print refrigerator magnets / whiteboard magnets.
Each model has one or more recesses designed for a 10mm x 2mm rare earth magnet. Such magnets are small but powerful. I buy those 120 at a time here: https://www.amazon.com/gp/product/B07KMXSLRB
Just print and use a drop of hot glue or your favorite adhesive to attach a magnet into the recess. Unless I note on a specific design, these will print without supports and I usually go with 10% infill.
If you have some larger magnets on hand, obviously you can just glue those over the recess area or scale the model up.
If you want to see all the magnets I have remixed, use this link:
I have designed over 500 remixes of various types. If you want to search by the type, visit my profile: https://www.thingiverse.com/ToaKamate/about