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 Dimensions of products was released in September 2017, with the cancellation of the line being announced the following month. "Lego Dimensions" features the same style of gameplay as the previous Lego video games developed by Traveller's Tales, in which up to two players control Lego minifigures based on various represented franchises. Players progress through linear levels, using their characters' abilities to solve puzzles, defeat enemies, and attempt to reach the level's end. Characters are entered into the game by placing their respective minifigures onto a USB toy pad, with each character possessing unique abilities that can be used to solve puzzles