I was asked recently what is grass polishing. It took me a few minutes to realize the child was asking about BRASS polishing! We have many objects to polish on the shelf and the child picks one and takes it to a table. After he/she puts an apron on, they carry a tray to a table with the items they need to polish as well as a mat.
The child dips the stick (with cotton on the end) into the brass polish (lemon juice and baking soda) and rubs it onto the object. After the polish is applied, the brass is buffed with a cloth. There is a visual control of error, the child is able to see if there are any spots that were not polished.
This provides for the development of hand-eye coordination, fine motor control, concentration and independence.