Looking really good. I think the table is the best motor to make the hobby evolve.
Anyway, can I ask you how old is your boy?
Mine is three years old, and all I could do is "narrative stories" and hand "fake-battles" but he is not ready for abstract things like dice rolls... We start with paper-rock-scissor (maybe the first wargame and I will dare to say the base of all wargames, let call it infantry-cavalry-bow), but I discover that he is not handling very well when he loose and try to cheat... I hope wargames will learn that there are some rules, not to cheat, playing is fun and winning something accesorie, and patiente, patiente, patiente.
So my question is how old do you thing a boy could start in a game with abstract miniatures and rules and dices to decide the fate of the miniatures?
I do not want to introduce him very quickly as the freedom of his mind now is the source of all imagination, and I do not wish to parcel it so early.