My train.

First I made a Cuboid, And short cylinders as it's wheels

and another cuboid for the train's Compartment

here is the basic shape of the train

from here, i shaped the front of the train

and added the top part and shaped it

here is how i shaped the top

and i took the same bottom half of the train and copied it

and i placed the boxes

voila!

Reflection: i feel that the train exercise is similar to the shapes exercise, but here we are required to move around the shapes to create the train