Yes, children need a separate visa to vit Luxembourg. To visit Luxembourg, all travelers who need a visa, including children, must get one. Children under 18 must also submit a birth certificate, a letter of consent from their parents, and copies of their parents’ passports or IDs. If only one parent is traveling with the child, they might need a notarized consent form from the other parent. Though visas are free for children under 6, they still need to go through the standard application process and provide all needed documents.