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
Lego tire Lego tire A Lego tire is a rubber tire manufactured by the toy building block company The Lego Group for use on vehicles within their Lego building sets. The tires are available in a range of sizes depending on the application. Lego first began manufacturing tires in 1962 and included them in what would become their most popular set at the time. Previously, the only tire options for Lego users were either purchasing complete car kits from Lego, or building their own tires out of existing Lego blocks. Lego produced 318 million tires in 2011, making them the world's largest