A joke is a way of getting people to laugh. It is a great opener for a speech or in a social gathering to break the ice. Laughter is the best medicine and very often telling someone who is sick a funny joke gets them laughing and for a minute or two they forget about their illness. Children love jokes, especially Knock, Knock jokes and once they find one they like, they tell it all the time.There are many kinds of jokes and you have to know when it is appropriate to tell one of the ones in your .