I'm trying to set up a scene with a train consisting of a few individual cars, each of which has two sets of wheels (rotating bogies with 4 wheels each). The idea is to make this train follow any path, as though it were placed on tracks.

I've searched around a lot, but I can't get more than making an array follow a path (useful for making the tracks themselves) and even that always seems to have a different orientation than I had in mind.

I hope someone here might have an idea on how to get an entire train to follow a path, instead of just one object (which I also fail to achieve).

To keep things as simple as possible I just created three blocks and a path (I attached a picture). The smaller blocks need to be anchored to the large block but at the same time follow the path.

Any ideas?