Before you begin to build your robot, it is important to become familiar with the different Lego parts in the Mindstorms kit.

Beams, bricks and plates are the structural components. Beams come in a variety of lengths and have holes in them to insert axles. Plates are flat pieces that also come in a variety of lengths and widths.

Axles are used for gears and wheels. There are a variety of axle lengths from 2 Lego units long to 12 Lego units.

Bushings go on axles to hold them in place. Half bushings, which are also small pulleys, have more friction than the full bushings and provide a tighter grip.

Connector pegs are inserted into the holes in beams.

There is a variety of tee fittings and elbows. These connect axles and connector pegs.

There are a number of different sized wheels for your robot from small to large. Tank treads are also available.

The Lego kit comes with many different types of gears.

Belts and pulleys are another means to transfer rotational motion.

Sensors are what gives your robot information about the world.

Motors are what make your robot move.

The RCX is the brain of your robot. It holds a computer program that reads sensor input and controls the robot's motors.

See also: Gears, RCX, Belts and pulleys, Sensors, Motors