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) Belville (Lego) Belville was a product range of the Lego construction toy designed to appeal primarily to girls. First introduced in 1994, the theme included multi-jointed doll-like characters, much larger in scale than the traditional Lego minifig. The sets include larger pieces, often in a pink and purple colour scheme, and depict scenes from fairy tales and fantasy as well as everyday life. Its direct successor is LEGO Friends introduced in 2012, and its direct target is kids (mainly girls). Other Lego product ranges designed for girls have included Homemaker (1971-1982), Paradisa (1991–1997), Scala (1997–2001) and Friends (2012–present). Belville bricks