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1. Take two bottles and fill them up a ½ a cup of hydrogen peroxide.

2. Then you add a little bit of liquid soap, also add a few drops of food coloring.

3. After that in one bowl you put 15 ml of dry yeast and 15 ml of warm water, and mix. In another bowl you put 30 ml of dry yeast and 30 ml of warm water and mix.

4. You pour the dry yeast and water mixture into the bottles. One bottle will have 15 ml of dry yeast mixed with 15 ml of water. The other bottle with hydrogen peroxide and liquid soap will get 30 ml of dry yeast mixed with 30 ml of warm water.