Duck should be Yellow

A kindergarten teacher handed out a colouring page to her class. On it was a picture of a duck holding an umbrella. The teacher told her class to colour the duck in yellow and the umbrella green, however, Bobby, the class rebel, coloured the duck in a bright fire truck red. After seeing this, the teacher asked him: "Bobby, how many times have you see a red duck?" Young Bobby replied with "The same number of times I've seen a duck holding an umbrella."