leagal question about representing yourself

In the US, can a 14 year old accused of a crime represent him or herself in court?

It would depend on the crime. If it was a minor misdemeanor, the judge at a minimum would require a parent or guardian. Anything more severe, the court will supply counsel. The one time a step daughter of mine got it trouble, she was provided an attorney. That was for malicious michief and destruction of private property. Of course with any legal question, a lot depends on your local and state laws. Reading your question again, the actual answer would be no.

Doesn’t the bill of rights garentee that one can defend themselves?

Robert E. Shepherd, Jr., Juveniles’ Waiver of the Right to Counsel: http://www.abanet.org/crimjust/juvjus/13-1jwr.html

A 14 year old is not legally able to enter into a contract or make other binding legal decisions for him/herself. Many laws give rights to adults that are not permitted to children. The Constitution also gives the right to vote to all - but you have to be a legal adult.

Nope.

The Sixth Amendment says that defendant have the right to an attorney, a right which has been clarified by a number of key supereme court decisions (most notably, Gideon v Wainwright).

The right to represent yourself was not clearly established until 1975, with the case of Faretta v California. The Supreme Court has carved out some exceptions, such as when the state belives the defendant is not competent (Martinez v California, 2003). Public opinion was swayed be cases like Colin Ferguson, who was allowed to represent himself even though it seemed clear that he was insane.