This 2 piece wooden train is compatible with Thomas, BRIO, and other wooden trains. It has a locomotive in front and a power engine in the back. It is a replica of trains which have a locomotive pulling up front and a 2nd unit in back generating power for the rest of the train. For train enthusiasts who want to add a realistic look to their train collection, this is a great gift idea! Compatible with all Thomas and other popular wooden railway systems. Not a battery powered train Ages 3 Years