The COVID-19 pandemic saw drastic and unprecedented actions by governments to mitigate the spread of the virus. Often, the restrictions limited in-person interaction and included the closure of schools. To investigate the impact of both the pandemic and resulting restrictions, the International Society of Child Indicators developed the Childrens Worlds: COVID-19 Supplement. This paper reports on the results of that survey in Wales in 2021. Seven hundred and twenty seven children from 18 schools participated from years 6 and 8. They received an anonymous survey asking about their circumstances and well-being across a range of domains, and how these have changes during the pandemic. The children had experienced significant changes in their lives with the onset of the pandemic. The majority could not attend school, were confined to their homes, and were unable to see wider family and friends in person. Almost a half of both groups felt that their relationships with family they lived with had improved, with many becoming closer to members. Over one-fifth of both groups thought their relationships with friends were affected, with younger children more likely to think they had improved. The pattern throughout the survey was that the older children were less positive in their responses. The disparity between the groups was markedly so regarding school with the secondary schoolchildren being particularly dissatisfied with the content of their learning. Whereas there was a trend for less disparity between the groups during COVID-19, the only area where the disparity increased was regarding satisfaction with school. These findings are then placed in the context of developments in education in Wales and research on the impact of COVID on Welsh schools and schoolchildren. As in other countries, the pandemic would appear to have exacerbated existing educational inequalities.