The citric acid inside will cause a chemical reaction that results in the bath bomb fizzing, creating bubbles and turning the water into different colors (before it dissolves). Related ...

The colorful tablets are flying off the shelves and have become the new bath bombs for kids. Even bubble baths lose their typical allure without an assist from these Color Drops. Related story ...

Overfill the molds slightly with the third color in each half to ensure the bath bomb holds together. 6. Form Bath Bombs : Press the two halves of the mold together and lightly twist to secure.