This is created after my son. Trains are a huge part of our family. My husband is the 4th generation of his family to work for BNSF Railway. As a kid he would put pennies on the track and see if the train would derail. I never knew such a thing until he introduced it to me. The texture and organic shapes the train created was so intriguing that I had to use it. My son helped me which he loved so much waiting and watching for all the trains to come by. After the train would go by we would pick up the coins and look at the texture, each ripple, and how distorted they were.