Actually I didn't have to do much beyond setting up the machines (in our case an Oric-1/Atmos) and getting the means together to load the old software archives on it.. once that was ready and booted, the kids just took over. It turns out that 8-bit computing is really accessible to little kids, just like it was for me in the 80's, and while that may have changed with the current generation: the old machines still live!
;)