Back in 1977, the Danish toy company, Lego, introduced a new set of interconnecting parts that allowed more complex constructions. This approach abandoned the iconic studded brick in favor of beams and connectors that create a vastly greater “space” of possible designs.
This studless product line is today called Lego Technic. It has evolved in various ways to include gears and motors and has even spawned several other Lego products such as Lego Bionicles and the modular robot system called Lego Mindstorm.
Lego Technic sets come with detailed instructions for how to assemble them into a motorized excavator or tractor or even a Lamborghini Sian Supercar.