Which one of these things is not like the other.

Dont really look for what doesnt fit. THere is a common attribute linking these things. except the robot. oh wait. I guess that is the thing that doesnt belong. The Robot. Or the food because its not made of metal like the traffic light and the Sauce pan and the Robot. But there is a secret connection that links alll but the Robot.
Oh plus this is a picture not a scan. weird huh.

Update: In retrospect not all of this makes sense.