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 Party mouthpiece "Global Times" praised Lego for its "good business sense" while the decision drew condemnation online. Lego fans offered to donate Lego bricks to Ai Weiwei instead. In 2017, Warner Bros, DC Entertainment and The Lego Group released "The Lego Batman Movie", as a spinoff based on one of the lead characters of Lego's first animated movie. Lego has since released another animated movie based on one of its toy lines, Ninjago, entitled "The LEGO Ninjago Movie" in 2017. In the first half of 2017, Lego saw its first revenue decline in 13 years, announcing plans in September 2017