
Children erect eggs in a kindergarten in Weihai City, east China's Shandong Province, March 21, 2011. Many places of China follow the tradition of erecting eggs on vernal equinox. It is said that due to the sun's equidistant position between the poles of the earth on the first day of the spring, special gravitational forces apply. (Xinhua/Yu Qibo)

Children erect eggs in a kindergarten in Zaozhuang City, east China's Shandong Province, March 21, 2011. Many places of China follow the tradition of erecting eggs on vernal equinox. It is said that due to the sun's equidistant position between the poles of the earth on the first day of the spring, special gravitational forces apply. (Xinhua/Sun Zhongzhe)

Children erect eggs in a kindergarten in Bozhou City, east China's Anhui Province, March 21, 2011. Many places of China follow the tradition of erecting eggs on vernal equinox. It is said that due to the sun's equidistant position between the poles of the earth on the first day of the spring, special gravitational forces apply. (Xinhua/Liu Qinli)

Children try to make eggs stand on themselves in an international school in Beijing, capital of China, March 21, 2011. Chinese make eggs stand as a tradition to celebrate the season of spring on the day of spring equinox. (Xinhua/Jin Liangkuai)