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 Homemaker lengths to represent either children or adults. Hair and other attachments were also provided to complete the figure. Starting in 1979 and continuing until the end of the series, several Homemaker sets included minifigures to represent toddlers and infants. The "Homemaker" figures would be included in the Universal Building Set line (a range of sets that focused on building and creativity) issued in 1977. Other product ranges that have been targeted to females have included Paradisa (1991-1997), Scala (1997–2001), Belville (1994-2009) and Friends (2012–present). Lego Homemaker Lego Homemaker was a product range of the LEGO construction toy designed to appeal