When I was a Cub Scout in the late 50's, our Pack and a bunch of others got to take a train ride from Detroit to Battle Creek and tour the Kelloggs plant. I know we rode on the Grand Trunk RR, because I remember where we got on the train down along the Detroit River east of downtown and I later learned that was the Grand Trunk Depot. We traveled along the track that roughly parallelled Woodward Ave., and I was able to recognize this and thus realize where we were. I remember very little about the tour, except one part where we saw corn flakes being made, going from lumps of cooked corn to pressed and baked flakes. They scooped some flakes hot from the toaster for us to eat and I remember they tasted spectacularly good. There was a park, or some sort of woodsy field, across the street where we went for lunch.
On the way there, the train was hauled by a diesel locomotive. On the way back, a steam locomotive was used. This was the only time I traveled behind steam on a mainline railroad. They gave us sample boxes of sweet cereal (like Sugar Pops) and so the way home featured a lot of little kids with sugar rushes. They also gave us toy rubber-band powered ornithopters, most of which never made it back to Detroit after trial flights and crashes in the railroad coach. This is a great childhood memory.