Lego MINDSTORM package gives you opportunity to build a robot that will obey your every command. Package contain well known Lego cubes and a “brain” needed for performing intelligent actions. NXT is a special Lego cube in which lies a small computer. Three motors and four sensors can be attached simultaneously on that “smart cube” . Color sensor can distinguish 6 colors and discern whether it is day or night. In combination whit ultrasonic sensor gives your toy ability to see.