This family of games goes by a variety of names but in all of them you are guessing what the card on your head is. Cards have a cartoon or name of something or someone or somewhere, and you must ask yes-or-no questions of all the other players to determine what/who/where you are. Part of the humor is in the absurdity of the questions the guesser asks, "Do I drop my leaves in the fall?" when it's a celebrity, or "Would you find me on a buffet?" when it's a football. "Am I covered in fur?" when it's Tahiti or cheesecake or George Bush. So it's a silly game, sort of an opposite of charades with 20 Questions mixed in. There is logic and luck involved - the number games are more intellectual - but many of the games are just for laughs.
There are junior versions of the games (animals or community workers), number versions (deduce the three digits), versions where you have two cards including a person and a place, an 80s version, etc..