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
Tente (toy) Tente (toy) Tente was a line of construction toys created in 1972 by EXIN-LINES BROS S.A., a plastics and toy company based in Barcelona, Spain which ceased operation in 1993. Subsequently, the trademark and patents were acquired by EDUCA BORRAS, and as of 2008 the toy line appears to be discontinued. Their later series were no longer compatible with the old system, although some models remained compatible. The toys consisted of multi-colored interlocking plastic bricks in multiple scales and an accompanying array of wheels, minifigures, and various accessories. Unlike the more popular Lego line of interlocking brick toys, which was