Comment by RobinL

letterpaths (https://github.com/RobinL/letterpaths), a FOSS typescript library that can power cursive handwriting/educational apps for kids.

The idea is that it provides all the geometry to enables games like these to be built: (These are just rough demos)

https://www.robinlinacre.com/letterpaths/writing_app/snake/

https://www.robinlinacre.com/letter_constellations/

And here is like the admin/demo: https://www.robinlinacre.com/letterpaths/

And, separately, I made an educational country quiz, again FOSS:

https://rupertlinacre.com/country_quiz

https://github.com/RupertLinacre/country_quiz