A girl shows her painted egg during an activity featuring local folk custom at a kindergarten in Zibo, east China's Shandong Province, May 5, 2012. The activity was held Saturday by the kindergarten to celebrate "Li Xia", the beginning of the summer in Chinese Lunar Calendar. [Xinhua/Zhao Dongshan]

A girl and her mother make cereal packets during an activity featuring local folk custom at a kindergarten in Binzhou, east China's Shandong Province, May 5, 2012. The activity was held Saturday by the kindergarten to celebrate "Li Xia", the beginning of the summer in Chinese Lunar Calendar. [Xinhua/Chen Bin]

A boy is weighed during an activity featuring local folk custom at a kindergarten in Liaocheng, east China's Shandong Province, May 5, 2012. The activity was held Saturday by the kindergarten to celebrate "Li Xia", the beginning of the summer in Chinese Lunar Calendar. [Xinhua/Zhang Zhenxiang]

Children show their painted eggs during an activity featuring local folk custom at a kindergarten in Zibo, east China's Shandong Province, May 5, 2012. The activity was held Saturday by the kindergarten to celebrate "Li Xia", the beginning of the summer in Chinese Lunar Calendar. [Xinhua/Zhao Dongshan]

A kid plays egg bump during an activity featuring local folk custom in Ningbo City, east China's Zhejiang Province, May 5, 2012. The activity was held Saturday to celebrate "Li Xia", the beginning of the summer in Chinese Lunar Calendar. [Xinhua/Hu Xuejun]