Bret Victor's talks, particularly 'Learnable Programming' and especially 'Inventing On Principle' [0] served as the inspiration behind my creation of an IDE called Leporello.js [1]. You can find my interpretation of his example from 'Learnable Programming' here: https://vimeo.com/870708017
To experiment with this example yourself, please follow the link: https://app.leporello.tech/?share_id=ece060b7c63121741be30fd...
As a shameless plug, earlier today I featured Leporello.js on Show HN [2]. If you have any questions, please feel free to ask.