My 10yo daughter wanted to make BMO earrings from the show Adventure Time. She designed and crafted them in Minecraft. I exported them via mineways and printed.. voila now my kids are creating all sorts of things.
More a proof of concept.
Objects exported from Minecraft via Mineways app are .obj files.. put them in Rhino to check and export to .STL
Printed with Sailfish .1mm at 120mm/s came out great
My Daughter wanted to enter these as a 'coolest thing' via my account.