There is a link on the BBC website to a fascinating old game that I used to own when I was very young.
It was a fascinating question and answer machine, all done with magnets so not really a robot. The game came with various sheets on which you placed the robot and then turned him until his pointer touched the question you wanted him to answer. The robot then had to be lifted up and put onto the answer section where he spun round until he pointed at the correct answer.
At the time of writing there are many different editions of this game for sale on eBay, some originals and some modern copies not made by Merit. Having checked on Amazon I was amazed to find new copies available at just £8.40 . . . actually quite tempted!