
City Trains is LEGO's main train line since 2006, when 7897 Passenger Train and 7898 Cargo Train Deluxe replaced the old 9 V system. The new trains ran on batteries and plastic track, steered by an infrared remote, and the track kept the curves and switch shapes of the old system so layouts could be mixed.
2006 LEGO Sets
2006 was a year of creative resurgence, adding major themes while closing older ones. LEGO Batman debuted as the first full DC Comics collaboration, joined by Avatar: The Last Airbender, Exo-Force, and SpongeBob SquarePants. LEGO Mindstorms NXT modernized the robotics platform with sensors and wireless control, and Remote Control Trains replaced the 9V system. Vikings and Clikits ended, while standout collector sets such as the Technic Tow Truck (8285) and Boeing 787 Dreamliner (10177) strengthened LEGO’s appeal among adult fans.