Thanks for the comment!
I never dreamed it would be this ambitious, but we just keep going.
I probably spend 75% of the time working by myself, but I keep him informed so he can join me when it interests him. I know that if I force it on him he won't learn OR want to do it. Once it is running in his room full time, I think we will spend LOTS more time together on the programming side - especially since I'll be doing the coding and testing in his room 