Grate a 2" piece of fresh ginger.
Add the ginger to a jar along with 1 tablespoon of sugar and 1/2 cup of water. Stir.
Cover your jar loosely and place in a warm spot in your kitchen. A coffee and a rubber band work well to cover it.
Each day, stir in another 2" piece of ginger, grated, 1 tablespoon of sugar and 2 tablespoons of water.
Continue for 5 - 6 days, or until bubbly.
You may then refrigerate your ginger bug and reduce the feeding to once a week, if desired. To re-activate, remove from the refrigerate and begin feeding daily.
Use 1/2 cup of ginger bug per 1/2 gallon of sweetened liquid to make soda.