
The 9 V system ran from 1991 to 2006 and is still a favourite with LEGO train fans. The rails have metal tops that carry the current from a speed regulator to a motor under the locomotive, so trains could run without batteries for as long as they stayed on the track. It started with 4558 Metroliner in 1991.
1995 LEGO Sets
1995 marked LEGO’s 60th anniversary and the 40th anniversary of the LEGO brick, a year of innovation and reflection. LEGO Technic CyberMaster blended mechanical engineering with early computer control, foreshadowing Mindstorms and LEGO’s digital future. For younger builders, LEGO Primo debuted as a pre-DUPLO system introducing infants to basic stacking play. Aquazone launched as LEGO’s first dedicated underwater adventure line, featuring the Aquanauts and Aquasharks. Castle expanded with the Royal Knights faction, while the company mourned the passing of Godtfred Kirk Christiansen, whose System in Play philosophy shaped LEGO’s legacy.