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 clone Plastic Moulding Industrial over its compatible BanBao's copycat packaging. The two companies settled their case out of court with Guangdong agreeing to create unique packaging and a new figure, ToBees. In 2016, Lego announced that it would be taking legal action against the Chinese company Guangdong Loongon, which manufactures the brand Lepin, for selling exact replicas of existing Lego products (including box-art). Lego clone A Lego clone is a line or brand of children's construction blocks which is mechanically compatible with Lego brand blocks, but is produced by another manufacturer. The blocks were originally patented by The Lego Group in