Three cheers for confidence! I am a bit conflicted as to the most effective way to portray your message. This is one powerful way that demonstrates many competing elements that have been overcome. At least one other way that accents simplification would be a much tighter crop around the toy train and the one rail with minimal background. Just ramblings, but I hope it helps. :)
If I'm honest, my problem with this shot is the dry grass growing in the tracks there. It really becomes the focal point of the shot, the little train is barely noticeable there at the edge. I think something more dramatic with the focus on the little train, or even this same shot with that grass pulled out of the way would be better.
An interesting idea, but it takes a bit to see the little train engine, it's so far to the left. The track pulls the eye to the right to start, then it wanders back to the weed, then finally the train.
I like the concept but the engine is so small and placed so far to the side that I have to go looking for it. The perspective is nice with the elongated track and colors are fine, the composition just needs a little tweaking.
I like the idea and the small scale of the engine next to the full size cars, but I think the composition could be a bit better - maybe a view from the ground up with the toy more prominant in the frame. Alternately, some burning of the background to put more emphasis on the toy train might work.