Well there's this thing I've been working on and off on for a while: https://mastodon.social/tags/ZX20

It has it's own BASIC but also emulates a Spectrum too. It's not yet quite full speed. I think beeper i/o is slowing things down.

When it's ready it'll be sold in kit form, so kids build it from scratch with their parents. The plan is to eventually have a space for kids to share their stuff, but no way am I charging kids for being creative.