1 Box prineted in 3D (three pieces) 4 Screws M3x12mm 4 Bolts M3 4 Neodymium magnets 10x2mm 6 Pieces of beryllium copper sheet arround 18x7mm or other thing for battery contact 30cm Of electric wire 1 ...

As established, neodymium magnets are the best. But you also have to choose the right shape based on what you want to display to keep your decorations in place and prevent any damage to your fridge.

An alternate and peculiar option left in our comments shows us how to turn off an internal MacBook Pro screen by using a magnet. Yes, like a refrigerator magnet. The result is basically the opposite ...