Since the escalation of conflict in Ukraine in February 2022, more than 7.7 million refugees have fled the country to seek safety in other European countries. An estimated 40% are children. Save the Children research with more than 1,000 children and caregivers in eight European countries, shows that children who have left Ukraine face significant challenges adjusting to their new environment. They report higher levels of anxiety and unhappiness than before, and a worryingly high proportion do not plan to enrol in or attend school. These findings are based on a survey and focus group discussions with children and their caregivers carried out in Finland, Italy, Lithuania, the Netherlands, Norway, Poland, Romania, and Sweden in July and August 2022.