Fisher-Price Thomas & Friends TrackMaster, Motorized Gordon Engine Redesigned TrackMaster engines feature enhanced speed and performance Each engine is a great addition to your expandable, connectable, motorized Thomas & Friends TrackMaster world Motorized train play is compatible with most TrackMaster track and playsets (sold separately) Requires 2 AAA batteries Perfect addition to your collectable, expandable, motorized TrackMaster world!