Canam Steel might do tours Kids can watch welding and steel forging. and the C&O is right there for lunch

Similarly the consol marine terminal might have a kids program where you can go look at the giant rail based coal shovel. Port of Baltimore is right there with big cranes and the giant salt piles from Mortons and all the trains.

Bethlehem was always a cool visit. Hopefully once steel is back up and running in tradepoint they will let the kids visit. Watching poured metal is special.