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
Belville (Lego) tend to have colors not typically found in traditional sets (e.g., pink, purple). Many bricks also have unique features such as embedded glitter. Belville figures are larger than the minifigure, but their feet can still attach to traditional Lego pieces. The figures have more points of articulation, and more overall detail than traditional minifigures. Some sets include clothing and other fabric accessories for the figures. The Lego Group also sold other items under the Belville trademark such as ice cube trays with unique shapes, and purses. Belville (Lego) Belville was a product range of the Lego construction toy designed to