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 Design byME as LEGO Design byME sets. This does not affect the HERO Recon Team Hero Creator range of products. Lego has confirmed that it will continue Lego Digital Designer as a free design software, and it will also keep its Pick-a-Brick service operational. Lego claims that Design byME has proven to be "too complex for children", and that despite its success, "the overall Design byME experience has struggled to live up to the quality standards for a LEGO service". Lego Design byME Lego Design byME was a service connected with the construction toy Lego. The service was launched in 2005 under