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 Modular Buildings contrast, a lower cost version of the set was considered which lacked rear exterior walls, interior stairs, and extra interior walls on the second floor, and had only 2 minifigures but no bike. LEGO fans could suggest improvements to the initial prototypes such as adding color to the roof (which was originally gray) and translucent elements to the hotel sign. Market Street (set number: 10190) was the second of the Modular Buildings series and designed by Dutch Lego fan Eric Brok. It was originally released as a follow-up to Café Corner in 2007 and priced at MSRP of US$89. The