People enjoy their time at the Lazienki Park in Warsaw, Poland, May 1, 2026. A European picnic was held here Friday to mark the 22nd anniversary of Poland's accession to the European Union (EU). (Photo by Jaap Arriens/Xinhua)

A child tries a police motorcycle at the Lazienki Park in Warsaw, Poland, May 1, 2026. A European picnic was held here Friday to mark the 22nd anniversary of Poland's accession to the European Union (EU). (Photo by Jaap Arriens/Xinhua)