LEGO Mindstorms NXT 2.0 is a robotics kit developed by LEGO, which allows users to build and program their own robots. The kit includes a range of components, including motors, sensors, and a microprocessor-based controller called the NXT brick.
Once you have built the robot arm, you can program it using the NXT software. The NXT software allows you to create programs using a visual programming language. lego mindstorms nxt 2.0 building instructions pdf
Here is an example program that moves the robot arm: LEGO Mindstorms NXT 2