1. NXT
A computer controlled brick and the “brain” of your robot that controls the motors and sensors

2. Motor
A geared engine that provides rotation when supplied with electricity. A motor converts electricity into mechanical movement.

3. Wire
The method of transport of electricity for the motors

4. Gears
A toothed part that can change the speed, direction, or torque (power) of your motor

5. Axel
A rod which is used to house wheels and join beams together

6. Beam
A building unit of LEGOs with holes through the sides. The most common building unit.

7. Bushing
A small piece which fits over the ends of axels to secure them into place

8. Peg A lego piece that goes through the holes in the beams Friction Peg
A peg that prevents the beams from moving when connected

9. Plate
Thin basic LEGO building piece

10. Block
Basic LEGO building piece