People visit the Shandong provincial science and technology park during the National Day holidays in Jinan, capital of east China`s Shandong Province, Oct. 7, 2011. (Xinhua/Xu Suhui)

Two girls are seen checking an electronical device at the Shandong provincial science and technology park during the National Day holidays in Jinan, capital of east China`s Shandong Province, Oct. 7, 2011. (Xinhua/Xu Suhui)

A boy studies a gravity device at the Shandong provincial science and technology park during the National Day holidays in Jinan, capital of east China`s Shandong Province, Oct. 7, 2011. (Xinhua/Xu Suhui)

Children are seen operating on a mechanical model at the Shandong provincial science and technology park during the National Day holidays in Jinan, capital of east China`s Shandong Province, Oct. 7, 2011. (Xinhua/Xu Suhui)

A girl is seen instructed to operate on an excavator model at the Shandong provincial science and technology park during the National Day holidays in Jinan, capital of east China`s Shandong Province, Oct. 7, 2011. (Xinhua/Xu Suhui)