Maybe a teen driving game.
You could make some colored ice cubes, then tape paper to something hard (or maybe use cardboard...) draw a driving course, and have the guests try to guide the ice cube from start to finish and "park" it. You could either have them tip the board, and use gravity... Or maybe a straw and they have to blow. either one can be made into a team game if you make bigger courses. Whoever stays on the road the best, wins.
Umm... You can ban certain "teen" words. Whoever says "like" or "whatever" or whatever word(s) you choose has to face a penalty. Maybe put a red gem (teenager acne is a notorious problem. Lol.) on their face, and whoever has the "clearest" skin at the end wins a prize... Maybe a bottle of face wash. Lol.
It is a 16 year old boy... You could do shaving cream on balloons, and whoever shaves it the fastest without popping it wins.