I have been wondering if something like https://gtoolkit.com/ https://gtoolkit.com/ would fit the bill, though I have to admit I find it a bit hard to grok. But

I have been wondering if something like https://gtoolkit.com/ https://gtoolkit.com/ would fit the bill, though I have to admit I find it a bit hard to grok. But having a form of interactive notebook running as an OS on a simple device could be a really powerful computing experience.