Classroom Guessing Game

Little Johnny was in class and the teacher said, "Okay class, what's behind my back?" She said, "It's round and red," and Sally said, "Ooh, ooh, it's an apple!" And the teacher said, "No, but I like where you're going with this." So now the teacher said, "It is also used to make multiple things," and Sally said, "Ooh, ooh, it's a container of paint!" And the teacher said, "Again, no, but I like where you're going with this." And the teacher said, "It's a ball of yarn," as she pulled it out from behind her back. Then Little Johnny said, "Okay, my turn." He said, "What's in my pocket? It's round and it has a head." And the teacher said, "That's enough, Johnny, now sit down." And Little Johnny pulled the thing out of his pocket and said, "It's a nickel, but I like where you're going with this."