Around 2.5 million children participate in judicial proceedings across the European Union (EU) every year, affected by parental divorce or as victims of, or witnesses to, crime. Although their effective participation in such proceedings is vital for improving the operation of justice, the treatment of children in justice systems remains a concern. The European Union Agency for Fundamental Rights (FRA) investigated to what extent children's rights to be heard, to be informed, to be protected, and to non-discrimination are fulfilled in practice.