These are so much fun! Right now on Jane, you can get this Fizzing Rainbow Bath Bomb for Only $9.99! (Reg. $20). This dreamy cloud foams and floats in the bath, painting a beautiful rainbow of color in this refreshing citrus floral fragrance. Carefully lay the Rainbow Bath Bomb on top of warm bathwater. As the bath bomb slowly dissolves, rainbow colors will be released into the bath. This bath bomb will foam and float on top of bathwater until it has completed dissolved.