Wow! Looks great and very inspiring. Great idea to make separate components that can be connected - something like a drum machine, sequencer, maybe even a chord synthesizer? It can be constrained such that you are always diatonic, you could have a mode knob too.

Jamming with other people can be a life changing experience, and to do that as a child would be a great privilege to have.

Im not sure youre aware of this but look up modular synthesizers. This is how electronic music was made starting in the 60s/70s

Yes exactly, it would be great to be able to sync the clocks so they all ‘just work’ together. And maybe also a module that gives all the other synth parameters for the more advanced user too. I say it’s for my daughter, but I actually would love this too.