Here is a model of a fully 3d printed ice creme machine that i desined, after I watching a video on youtube from 3d printer acadamy where he showed his own one. I thaugt it wold be fun and tasty way to get into 3d modeling.

To build it yourself you will need :

-a 10 rpm motor

Link:DC-Getriebemotor, DC 6V High Torque 1: 1000-Getriebe-Motor Model Hobby: Amazon.de: Spielzeug

-an old chager cabel wich outputs 5v, from wich you strip the cabels and conect to the motor

or

-a battery pack wich outputs 5v

then you just need to glue the motor on the stand off on the side and slide on the jar holder