I made a bath bomb for the first time..1 cup baking soda,1/2 cup citric acid,1/2 cup cornflour,4 tablespoons oil,1 teaspoon fragrance oil,1 tablespoon oatmeal powder,1 tablespoon milkpowder..while mixing it created fizz,but when i poured into tub,it dint react at all..i had to break it by hand and mix it in water..it is semi solid,soft and could break easily.