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.
2007 LEGO Sets
2007 introduced the Modular Buildings series with Café Corner (10182) and Market Street (10190), defining a new era of advanced architectural builds. LEGO Star Wars celebrated its 30th anniversary, commemorated by a limited 14-karat gold C-3PO minifigure. New or refreshed themes included Aqua Raiders, Mars Mission, and a modernized Castle line, while Knights’ Kingdom II and the 9V Train system were retired. DUPLO added Thomas & Friends, extending LEGO’s preschool range.