Oh yeah I used t do that. Pennies and Nickels on the Train Tracks...I know it was not safe, but things back in the days were a little more dangerous. I remember people saying that a penny placed on the tracks will derail a train. So I was always afraid, but then I found out it was lie. I think at one point I might have put like 5 pennies in one time... I was a kid, and it was awesome.....It was difficult to find the penny sometimes. Then I learned You must use a piece of chewed gum to hold it on the rail, otherwise the vibration will move it over the edge....SHARE if you know or head about this :)