I make the fizzing kind, not the bubbling kind, I have a think against SLSA now, probably because I decided to smell it the first time I opened a container of it, I really should have paid attention in high school science. What Robin said is perfect, I mix my dry stuff without the citric in a large bowl, sifting them all well first. Then im mix my oil , water and FO in a jar, I add a small amount of borax to this to emulsify. I mix my wet (castor oil and sweet almond oil with a touch of water ) with my dry, then when its thourghly mixed I add in my citric, and mix like mad again, I use christmas ornys as molds, overpack them, squeeze tightly for about 10 - 20 seconds, leave it in the whole mold for about 5 minutes, take the top half of the mold off , leave it in the bottom half for another 5, when I have more molds, i'll leave them in there even longer, prevents flat bottoms. If your mix becomes to dry to mold, add a small drizzle of oil and stir in in quicly , DO NOT ADD MORE WATER. I leave them in my workshop with the dehumidifer to dry overnight. I can drop my bathbombs on the floor from shoulder hieght and they will not break, they are rock hard, but fizz wonderfully in the tub, they do not feel overly oily while you are soaking (i HATE oily bath water) but leave your skin feeling wonderfully soft and conditioned.