Students from Chongqing Road No. 2 Primary School have summer classes at the Qingdao Shell Museum in Qingdao, Shandong Province, on Monday. A museum guide introduces a nautilus shell to the students. (Photo: VCG)

Standing in front of display cases, two children talk about the magical world of shells.

A girl presses her face against a display case to get a closer look at the shells.

During this visit, the students see examples of more than 17,000 kinds of shell specimens and fossils from around the world. (Compiled by Zhan Huilan)