Thanks for sharing that, Miranda.
I think it is funny that they didn't get electricity til the 40s or 50s since the place it is in is named after Tesla, who was real competition for Thomas Edison.
There is an old school house like that at Knott's Berry Farm (amusement park) in So Cal. I liked visiting that part of the park better than the newer sections. (You can still pan for gold there!)
Its really nice that you get to go along on field trips with your kids too.