On October 29, 2021, Queen Margrethe of Denmark attended the Børneringens Nature and Science Festival 2021 (Børneringens Natur og Science Festival 2021) in Hillerød. Together with 250 children, the Queen planted trees in Hillerød municipality's new public forest. The trees were planted on the occasion of Børneringen's 80th anniversary, and the event was organized by Børneringens in collaboration with the Danish Nature Agency and the Growing Trees Network Foundation.