Tuomas Laine-Frigren specialises in the history of childhood, migration and mental health. His latest book, Sotalasten monet elämät (2024), examines the experiences of the 70,000 Finnish children evacuated to other Nordic countries during the Second World War. This book is due to be published in Swedish in January 2027. His other areas of interest include the history of psychology, the history of Cold War Hungary, disability studies, and the political history (and weaponisation of) antisemitism. Laine-Frigren is the editor-in-chief of Lähihistoria (Finnish Journal of Contemporary History).

My current research project examines the childhood experiences of second-generation Finnish migrants, i.e., Finns who grew up in Sweden as children of migrants during the 1960s–1980s. Some moved there with their parents, some were born there, and some eventually returned to Finland. The project focuses on the everyday lives of these young immigrants and the encounters that shaped their experiences as the children of immigrants. It explores how these children and young people navigated their position as immigrants. My particular interest lies in peer relationships and the spaces, places, and communities of children and young people. I aim to expand current theoretical fields of migration and childhood toward "children's politics," in which children are seen as actively creating their own lives by interacting with adults and their wider social, cultural, and material environments.