LEGO Mindstorms NXT

* Intelligent brick with 32-bit microprocessor; more memory and flash
* Three interactive servo motors features built-in rotation sensors that aligns speed for precise control and new sound patterns and tones
* 577 specially selected LEGO TECHNIC elements for sturdy and durable building and improved functionality and movement
* Icon-based drag-and-drop program building environment
* 6 AA batteries required which is not included