Hello, I purchased this toy and I recommend it to anyone wishing to explore the world of robotics. However, given the quality of components, technologies used and the fragility of all I would advise selling this package to 20 maximum. Another note: the sound of the robot (buzzer) is so strident quite unpleasant. Tip sensitive robot to obstacles: orient slightly infrared transmitter / receiver to improve the obstacle detection (with many course delicacy). Advantage: Electronic circuits are independent they can be reused for other applications and environments.
