Some relatives brought their 2 sons, age 14 & 10 for a visit. As they are from Allentown, I loaded the NS/Reading Line (a very prototypical, well done route, by the way). I set up every type of train possible that I could think of, including ten A23 (697mph) Jet Sleds. They had a wonderful time crashing all the trains right off the end of the world baseboards, and most of the trains ended up in the river ! Of course they wanted to jump right into cab control view, the hardest operation to learn how to master. Operating the hump yard was quite fun, but the retarders didn't work so well, and we had hundereds of runaway loose freight cars rolling downhill towards Reading, in excess of 60 mph. Too many wrecks to capture on screenshots ! Last time I wrecked was months ago...Boy...was I ever glad they finally went home.