Topic: Field Trip
We only had time for one more museum and chose the Model Railroads.
They had several rooms (28.000 square feet) with vast landscapes and featured O, HO and N scale trains.
We didn't get to see it all as we had to make a run back to catch our ride back to the port.
In fact, we didn't even get to use our fourth museum pass at all, due to time constraints.
I can't imagine trying to see all 15 museums, let alone participating in many of the other activities at Balboa Park.