I think with this block you need to use a little imagination. Remember, it is made from 2-inch squares and half-square triangles...and I do not have any blacks or grays in this fabric line, although even if there were I'm not fond of black smoke billowing out of a train. So, I improvised. If you look at it from a distance it does somewhat resemble a train.
There are only 86 pieces in this 12-inch block and it is block number 171 of 366. I had to hurry a bit to finish it as the day kind of got away from me. I'm linking with Fabric Tuesday and Quilting by the River. Happy Stitching!! (Are you working on those 9-patches?)