Bat Fridge Magnet.

Uses Seven 6mm x 3mm magnets.

This is a glyph from a “bat symbols” font enlarged to be the whole model. You can optionally hide magnets inside it, there are holes for 6mm x 3mm magnets (about $10 for 100 from AMZN). Insert a pause when slicing at the layer just before the holse are bridged over. Press fit the magnets (they are a friction fit in 6.15 mm holes if you do it when the PLA is warm, if you let it cool it will be much harder to get them in. Once you have the magnets in place unpause and they will be hidden inside the model.