In most jurisdictions, children below a certain age—often around 10 to 12 years—cannot be held criminally responsible for their actions and therefore cannot go to jail. This is based on the understanding that young children may not have the capacity to understand the consequences of their actions or to distinguish between right and wrong.
Instead of jail, younger children who commit offenses may be dealt with through the juvenile justice system, which focuses more on rehabilitation than punishment. The approach to a child's behavior often involves intervention measures, such as counseling or community service, rather than incarceration. However, laws can vary significantly by country or even by state or region, so specific regulations may differ.