Yet another approach to editing s-expressions visually, originally designed with mobile in mind but potentially interesting for teaching.

This actually looks really good, I have forwarded it to some parents with elementary school kids, lets see how they roll with it!

I like the use of corners for draggable UI — feels very Fitts-friendly, though I wonder if that works just as well on mobile (since the screen edges are no longer "infinitely" wide). I also like the floating panels on each screen edge, specifically that you're encouraged to set them up arbitrarily however you like. This all has a really friendly vibe.

Wow so clever! I love how the discard corner keeps reference to the last discarded thing so you can drag it back out to undo. There's very few actual buttons, just things you can drag where you need them

I suspect that code written via this interface will look quite different to code written in text editors, because of the very different visual impact of nesting.