Recent U.S. policy changes have contributed to longer waiting periods for migrant families in Mexican border cities. This study centers on four Honduran families enrolled in the Migrant Protection Protocols (MPP) policy, also referred to as ‘Remain in Mexico,’ while undergoing prolonged waiting periods in the Mexican border town of Monterrey, Nuevo Léon. Centering on young people’s voices, we ask what they learn during this prolonged period of transit. Through ethnographic and digital participatory storytelling interviews, we illustrate how children learned about the politics of border crossing through fraught interactions with im/migration officials, prolonged periods of immobility, and evolving understandings of legality. Building on theories of ‘border thinking’ and ‘politicized funds of knowledge,’ we highlight ways that young people employed their evolving understandings of national borders and the legal contours of their transborder asylum process, while protecting themselves and their families from danger and discrimination. We argue that transit is not simply time that young people are forced to endure; rather, the experience of forced transit is constitutive of young people’s learning about state power and their evolving understanding of borders, rights, and belonging.