Are there any countries that never allow children to be tried as adults or be housed in adult prisons?

Yes, several countries have laws that prohibit the trial of children as adults or their housing in adult prisons. For example, in countries like Norway and Sweden, there are strong legal frameworks in place that prioritize rehabilitation over punishment for minors. The United Nations Convention on the Rights of the Child also advocates for the protection of children in the legal system, influencing many nations to adopt similar policies. These countries focus on age-appropriate interventions rather than adult sentencing.