Anatomical heart that has a loop to put on a key ring or maybe even a necklace!
Prusa
Prusa Clone
Doesn't Matter
Yes
0.1 mm
100
The inside is hollow but that shouldn't matter much. The supports were numerous and tedious to remove especially on something so small, but it looked so cool it was definitely worth it.
EDIT: edited the model to make it solid! Shouldn't have any more issues with tiny supports in the arteries.