This range of Lego has been around from a very early stage in the companies expansion.
It is what makes Lego such a useful Construction Toy. It includes Wheels, Holed Beams, Axles, Connecting Pins, Universal Joints, Cogs (including complex clutches and worm gears), Pneumatic components (which the glaring ommision of a Solenoid operated valve), motors, sensors and even computers.
It is Lego Technic which has started off a lot of hobbyist robot builders, and will continue to keep them in good stead for the future.
Time to build your own robot! Using a Raspberry Pi with parts and some time, you can use my book to learn how to make and program a robot with automatic behaviours.