I am trying to get some help. I was at a layout last year and there was a Mickey Mouse bank turned into a train car going around by itself. I don't know what was used to propel the car. I know a bank was used and the bottom was cut out and fit over something that made it look like the car was driving around the track. I thought of a hand car or an engine with the shell removed and the bank placed over the frame. If anyone has any idea how this could be done I would appreciate the help. The car bank is 8 inches long and 4 and 3/4 inches wide. It may be 3 and 3/4 inches not sure.
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