Ondra's investment game source code is at
https://github.com/otulach/investicnihra
and people can play it at
http://hudson.apidesign.org/hudson/job/Investicnihra/javadoc/
Source code for my Karel implementation (with blockly) is at
https://github.com/jtulach/karel/
Thanks for sharing your experience. Jaroslav Tulach
Programming environment, with emulator: https://makecode.microbit.org
Kits of components: https://4tronix.co.uk/store/index.php?rt=product/category&path=91 https://4tronix.co.uk/store/index.php?rt=product/product&path=82&product_id=530
Programming the teacher (Dutch, but fun nonetheless): https://www.youtube.com/watch?v=wpC56gn79YQ
Hour of code: https://code.org/learn
Raspberry Pi Traffic crossing HAT: https://4tronix.co.uk/store/index.php?rt=product/product&product_id=594