In juvenile court petitions alleging that defendant possessed metal knuckles and possessed a weapon on school grounds, order sustaining petitions and adjudging defendant as a ward of the court is affirmed over claims of error that: 1) the juvenile court improperly admitted expert testimony; 2) there is insufficient evidence to support the court's finding that he possessed metal knuckles; and 3) the juvenile court failed to declare the offense a felony or misdemeanor, as required by statute.