I'm humbled by your comments and glad you like them. I have had mine for about 6 years and they have worked well so far. I'd love to change to some digital ones, but they seem to have become impossible to find the last few years.
You have a much nicer transformer setup than I do, I like the lift up panel to access the wiring. I think the kids will get some good education on wiring and possibly electrical circuits too. Great educational stuff for them. I'm glad they are interested and hope their interest continues for many years to come.
Thanks for the kind words on the parts thread. Good to see someone getting some use out of it.