It's against the law for anyone under the age of 21 years to buy, possess or drink any alcoholic beverage, or to falsify age in order to buy liquor. Alcohol related traffic accidents are a leading cause of death among teens. Excessive use of alcohol often leads to drunkenness, fighting, disorderly conduct, and driving while impaired. For example, if you have a gun under a newspaper on your car seat, you could be charged with carrying a concealed weapon. Arizona Revised Statutes state that no one under 21 years of age may legally carry a concealed weapon.
Fireworks are against the law, too.
Police are authorized to seize any unlawful fireworks in your possession. Public display of fireworks is permitted only upon approval of the Fire Department. It is a misdemeanor to stand on any roadway for the purpose of hitching a ride from a car. Hitchhiking is dangerous. It is the indirect cause of many accidents.