Little Johnny guessing objects

The teacher told the class that today they'd be guessing objects from physical description. She said, "I will hold an object under my desk and physically describe it to you, and then class, you have to tell me what you think it is I have under my desk." First the teacher said, "I have something long and yellow, what is it?" Sally raises her hand and the teacher calls on her, "What do you think it is Sally?" "It's a banana", replied Sally. "No, it's a pencil" said the teacher, "But I like the way you think." Next the teacher said, "I'm holding something round and red, what is it?" Billy raises his hand and the teacher calls on him, "What do you think it is Billy?" "It's a tomato" says Billy. "No, it's an apple" says the teacher, "but I like the way you think." Little Johnny raises his hand so the teacher calls on him and says, "Yes Little Johnny." "Well Ms. Smith, I have one for you" says Little Johnny. "Okay says the teacher." "What's round, hard, and has a head?" replied Little Johnny. "Oh no, Little Johnny that is not appropriate for school at all." says the teacher. "It's a quarter" says Little Johnny, "but I like the way you think."