That looks seriously cool. Just the colors give me goosebumps :)

completely offtopic:

My dream is to build a super cheap child friendly computer, that the kids can build themselves, has a software keyboard that directly polls the gpio pins so that kids can modify their keyboard instead of having a keyboard controller (just so there is less mistery in what happens when a key is pressed). And the OS is something inspired from LEAP: https://www.youtube.com/watch?v=o_TlE_U_X3c that allowing you to evaluate code and apply it to your current file. A bit like your LOAD81 but with text.

I have a prototype now: https://github.com/jackdoe/programming-for-kids/blob/master/... but it has a long way to go.

This looks seriously cool. May I ask how old your daughter was when you started working with her on this?

Wow. I opened the triangle demo and I felt like I was transported back in time to when I had an Acorn Electron and would type in BASIC programs from listings in magazines.

I was about 10 then. I hope my son (7yo) starts to find this stuff interesting soon.