Awesome work, I will introduce this to my kid. With the built-in database/kv-store and excellent UX, I can't think of a better platform to get started with web development.
How does your kid like 1MB?
He's mostly concerned with the learning curve of HTML and CSS, so I'd say that it's a success so far - no tooling got in the way of his learning. We haven't gotten to using the database yet...