We did this tour about three years ago. I have photos of Happy standing in one of the tires & it was taller than he was. Now he's taller than the tires. ;-)
The Madison Fire Department is a local one to us & is a volunteer department. The closest full-time fire department is about an hour away. This particular station has a Junior Axillary made up of high school student who want to be fire firefighters. They are the ones that did the tour for us. At the end, their instructor did a talk on fire safety.
All the kids had a great time & my boys enjoyed it.