Magnetic Heart Pendant
I remixed this from https://www.thingiverse.com/thing:189379, which is also a remix. :P
I wanted to make a heart pendant that would attach to another, so my wife, and I could both wear one, so I added a hole to the pendant to fit an 8x3 magnet into it.
8x3 magnet: https://www.amazon.com/gp/product/B07B3SDRCP/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I was able to squeeze the magnet into the pendant with some force. I recommend using something flat to push the magnet down into the pendant.
The heart itself has supports, but make sure to use a support for the hole.
If you would like to see me make something else, feel free to message me.