LEGO Trains is one of the longer running themes that dates back from 1966 and ran up until 2006. During its run there were multiple sets released running on various power platforms from 4.5volt, to 9 and 12 volt sets. Later in 2011 LEGO released additional train sets using RC and Power Functions controllers under different themes like City.
1968 LEGO Sets
1968 was a landmark year with the opening of the first LEGOLAND park in Billund, Denmark, attracting hundreds of thousands of visitors. LEGO also introduced the first 12V train motor, spoked wheels, and magnetic couplers, greatly improving the realism of its Train line. The company refined packaging with photo-based idea layouts and transitioned away from the small-scale Town Plan system. This year also marked the arrival of Jens Nygaard Knudsen, who would go on to design the LEGO minifigure and shape future core themes.