Heart magnet
thingiverse
You'll be needing a 6x3mm (diameter x height) rare earth magnet from eBay or another source. Simply force the magnet against the desk, and it will fit snugly inside the hole. Alternatively, you might consider creating two hearts with opposing magnetic poles to link them together! Have fun!
Download Model from thingiverse
With this file you will be able to print Heart magnet with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Heart magnet.