Preschoolers were the most affected by the restrictions during the pandemic, particularly for physical activity and recreational screen time. This may be explained by preschoolers needing more space to play and having greater access to screen-based devices than toddlers. The reduction in physical activity and the increase in screen time have particularly affected those with previous enrolment in an ECEC. Schools would be in a better position to respond with specific actions to prevent physical inactivity during this period than ECECs, as children and adolescents are more likely to be connected to participate in their virtual school activities than toddlers and preschoolers. Therefore, governments, policymakers, and professionals should devote particular attention to this age group.