Basically, Magic Robot was a number of large paper cards with a reflective disc in the middle. This is where you placed the robot. The robot had a wand/stick in his hand and you pointed this to the question, let go and then it spun to the correct answer, which was in circles around the paper. it was the most amazing thing I had ever seen and still stumps me to this day. It was correct every time.
Forget Bewitched, this was real magic!