Educational toy made in plastic versions. In the mid-1950s, more explicitly engineering-themed construction toys appeared, including plastic girders, columns, and panels that could be assembled into a model curtain wall skyscraper. Later, this Girder and Panel structural system was extended to a Hydro-Dynamic setup by adding pipes, valves, tanks, nozzles, and pumps to allow construction of model plumbing, HVAC, and chemical engineering systems like a simulated distillation column. Other extensions of the system supported suburban-style housing developments (Build-A-Home), or monorail transportation systems (Skyrail). The building toy Lego was originally developed by Ole Kirk Christiansen in Billund, Denmark, in the 1930s. The name
History of Lego race car and an off-road vehicle, featured a level of detail and realism not previously seen in any Lego series. Where Technic was mechanically accurate, Model Team was visually and stylistically accurate. The Lego Group became one of the top 10 toy companies in this year; it was the only toy company in Europe to be among the top 10. Legoland Billund had more than one million visitors in this year, for the first time in its history. The first-ever "Lego Professor of Business Dynamics," Xavier Gilbert, was appointed to an endowed chair at the International Institute for Management Development