The Marx #4351 Electric Train Set was released in the 1960s and typically featured a steam-type locomotive, a tender, and several cars such as a hopper, tanker, and caboose. The set often came with a 25-watt transformer, a figure-eight track layout, and cardboard building cutouts, offering a complete setup right out of the box. It was marketed as an affordable and accessible option for hobbyists and children, with the “chug chug” sound feature being a standout.