Simple mini water pump that uses a cheap DC motor and 3D printed parts only. In total just 3 printed parts.
There are two versions of the turbine, V2 is more efficient. Some parts need support to be printed.
More information about the project:
https://www.instructables.com/id/3D-Printed-Water-Pump/
https://www.youtube.com/watch?v=qX5YHNfzSao