1, a piece of wood, about 20 centimeters long, 3 cm wide, 0.5 cm thick
2, a small wooden stick, cylindrical, 25 cm long, about 3 mm in diameter (from the wood Or bamboo slowly cut, well-proportioned as possible, it is best to prepare a little longer.)
3, a sharp knife.
5, fine sandpaper
be a hole in the center of wood Control diameter, slightly smaller than the small wooden