ALEX Spa DIY Bath Bombs explode with essential oils and fizzy fun colors. Relax in a warm tub, colored and scented especially for you. Add your favorite skin conditioning oil for healthy soft skin. Just follow the directions to mix the proper ingredients and create a unique ball or heart shaped bath bomb for yourself of a friend. The kit contains enough materials to make 6 luxurious gifts. Includes heart-shaped mold, ball mold, 2 baking sodas (2.5oz. / 72g. each), 2 cornstarch (1.25oz. / 36g.