A boy flies a kite on Cricket Hill in Chicago, the United States on May 2,2015. The annual Kids and Kites festival, organized by the Department of Cultural Affairs and Special Events of City Chicago, held in Chicago Saturday. The organizer provided kite kits for children to build, decorate and fly and some other activities. (Xinhua/He Xianfeng)

Kids and their mothers make kites on Cricket Hill in Chicago, the United States on May 2,2015. The annual Kids and Kites festival, organized by the Department of Cultural Affairs and Special Events of City Chicago, held in Chicago Saturday. The organizer provided kite kits for children to build, decorate and fly and some other activities. (Xinhua/He Xianfeng)

Kids and their parents fly kites on Cricket Hill in Chicago, the United States on May 2,2015. The annual Kids and Kites festival, organized by the Department of Cultural Affairs and Special Events of City Chicago, held in Chicago Saturday. The organizer provided kite kits for children to build, decorate and fly and some other activities. (Xinhua/He Xianfeng)

Kids and their parents fly kites on Cricket Hill in Chicago, the United States on May 2,2015. The annual Kids and Kites festival, organized by the Department of Cultural Affairs and Special Events of City Chicago, held in Chicago Saturday. The organizer provided kite kits for children to build, decorate and fly and some other activities. (Xinhua/He Xianfeng)