In the juvenile system, a child under the age of 10 is usually referred to as a "juvenile" or a "juvenile delinquent." This term is used to describe minors who have committed offenses that would be considered crimes if committed by an adult.
Children under the age of 10 who are involved in the juvenile system are treated differently from older juveniles due to their young age and level of development. They may be subject to alternative interventions such as counseling, family support services, or educational programs aimed at addressing their behavior and preventing further involvement in delinquent activities.
It's important to note that the terminology and procedures related to juvenile offenders can vary by jurisdiction, so the specific term used for a child under 10 in the juvenile system may differ in some cases.