There are a lot of games that are great for children's parties, including a variety of board games, card games, and fun games that include winning prizes.  Most games that are ideal for children's party settings include a lot of vigorous physical action, like popping balloons, chasing other children, hiding suddenly behind couches, or similarly boisterous activities.  There is also a wide array of games suitable for adult parties, many of which include logic, puzzles, wordplay, or other sophisticated forms of playful reasoning.  However, there are few games suitable for adolescents.  The ideal game for teenagers or young adults would include some elements of fun physical play, which can make a game more memorable and can help the players throw off some of their hesitations and self-consciousness.   A game made up solely of this kind of physical action might be fun for a little while, but it would be likely to lose the attention of most teenagers quite quickly, because most teenagers certainly enjoy a challenge that goes beyond the realm of simply physical prowess.  However, a game that is based almost entirely on logic or wordplay and has no room for goofy physical play would not be quite right for a group of teenage or young adult players either, as they would probably find it too conservative or boring.

The ideal game for a group of teenagers or young adults is a game like Who Is The Murderer.  This game is best played in a group of six to ten people.  If you have too few people playing Who's The Murderer, the answer will be too obvious too quickly and the game will not be much of a challenge.  However, if you have too many people playing Who's The Murderer, there will be no chance that the Detective will be able to find the Murderer so there will not be much suspense in the game as the result will probably be mostly a foregone conclusion.

To play Who Is The Murderer, everybody except one player sits in a circle.  This lone player is called The Detective, and it will be his or her job to find the Murderer through the course of the game.  The Detective waits outside while the players in the circle choose who will be the Murderer.  Once the Murderer is chosen, the fun part of Who Is The Murderer begins.  To play this part of the game Who Is The Murderer, the Murderer winks at people in the circle.  When a player is winked at, he or she needs to die.  The best deaths should be very theatrical with a lot of screaming, pretending to cry, shouting in agony, and so on.  These crazy fake deaths are part of why playing Who Is The Murderer is so much fun, so teenagers can really cut loose when they pretend to die.  The Detective watches who dies, and tries to guess who has winked at them.  If the Detective cannot guess who the Murderer is in three tries, the Murderer has won the game. 

The game Who Is The Murderer can go for as many rounds as the participants want.  If there is an ideal sized group of between six and ten people, it is feasible to play enough rounds that everybody gets a chance to be the Detective and try to guess the murderer.  However, play does not need to continue that long if the players don't wish it to.  To make playing Who Is The Murderer a bit more competitive, it is feasible to time the rounds with a stopwatch, and to give a prize to whichever Detective is able to solve their round of play the quickest.