I wanted to create a hanger of the existing 1UP mushroom, but I found it too low-poly, so I redid it from scratch.
Perfect as Christmas Ornament or Baby Mobile Hanger or Keyring (75% scale is a nice Keyring size!)
It does need support under the hood. Otherwise it's pretty straight forward. I did mine at 100 micron at 60mm/s on the Big Builder Dual Feed.
----- UPDATE - December 2014 -----
I got a few requests for making a modular single extruder version with multiple colors that can be put together after printing. I've added these files now with "modular" in the file names. I've made a version of the top dot with and without the hanger.