LEGO MINDSTORMS NXT is back & better than ever new models more customisable programming & all-new technologies MINDSTORMS NXT 2 0 combines the versatility of the LEGO building system with all-new technologies an intelligent microcomputer brick & intuitive drag-&-drop programming software The new 2 0 toolkit features everything you need to create your first robot in 30 minutes & then thousands of other robotics inventions that do what you want Requires 6 x AA Batteries