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Children's learning programming language Karel the Robot in 3D
... in Slovak language from years 1987 - 1990
Writen in HTML for fast universal use, including JavaScript code with Three engine.
After download and unzip, runable (run html file) without installation in internet browser.
Tested in EDGE and Chrome.
Version without WebGL, and just as one file (+ include examples in text file):
https://sourceforge.net/projects/karel-3d/
C++ version: https://sourceforge.net/projects/karel-3d-cpp/