Dog Paw with hole for magnet in the back. I printed 2 and put them on my screen door so my dog wouldn't run into it anymore.

Printed at 0.2mm layer height, 15% infill, I tried printing it with and without supports, both worked fine. Added a printer pause to switch filament to get the 2 different colors. 

The magnet I used was 15 mm in diameter and 2.7 mm in height, it fit in the model snuggly but I did use some superglue to make sure it wouldn't fall out.