Shiny mud balls made by Japanese students

Making hikaru dorodango was a traditional pastime among the children of Japan that is making a comeback.
Hikaru dorodango are balls of mud, molded by hand into perfect spheres, dried, and polished to an unbelievable luster. The process is simple, but the result makes it seem like alchemy.
The exact origin of hikaru dorodango is unknown.
The tradition was dying out until taken up by Professor Fumio Kayo, of the Kyoto University of Education.
With the help of Japanese media, Kayo has revived and extended the popular reach of this tradition to the point where it is now an international phenomenon.
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