A volunteer from Nantong University shows a boy how to paint a picture of the earth at Hongqiao No 3 Kindergarten in Chongchuan district, Nantong, East China's Jiangsu province, on April 19. The activity was held in celebration of the 50th Earth Day, which falls on April 22, and to welcome the upcoming China Forest Tour Festival, which will be held in the city in October. [Photo/zgnt.net]