Candy 3-Racing RC car.
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This test/demo is based on 3-racing RC car kit.

.. figure:: pics/210824-candy-3-racing-demo.jpg

   Candy board can show camera and control throttle/steering on RC car, etc. 

.. figure:: pics/210822-open-scad.jpg

   Open SCAD makes 3D design be like programming. It can render (F6) and export (file, export) a design as .stl file.

.. figure:: pics/210822-ultimaker-cura.jpg

   Ultimaker opens the .stl file and slices it as 3-printable code for specific printer. This can be saved to printer's SD card and printed from there.