Here below is the first Dorodango that I made basically using the instructions defined in the following link: http://www.kyokyo-u.ac.jp/youkyou/4/english4.htm
It is a Japanese technique that uses only with common earth and water. I find it pleasant to do and it lets me understand much better the properties of earth. That knowledge comes very handy when you are making a mud house with cheap and easily accessible materials (just dig a hole to get them).
Making it is fast and fun and lets you understand stucco techniques better. The surface is cold, very soft, and shiny. It can be used to make a pretty and classy surface (wall or ground), made with the most common material on earth: earth.
It can easily be made water proof or at least quite water resistant. That comes handy if you want to use the technique for a wall in a bathroom or in the exterior.
Its very pleasant to do, I recommend it to anyone, you just need earth, a bit of water and preferably a dry day. Kids love to do it too and you end up with a pretty piece of decoration at the end.
It is funny to remark that all the people I have showed it too and ask what they thought it was responded something else than mud, they most think it is some kind of metal, or stone, or marble.
Best wishes for all !
Here are more pictures about dorodangos I made: https://www.facebook.com/media/set/?set=a.1101799796548419.1073741829.982814768446923&type=1&l=6c4ddb945f