Choose your bath bombs’ color. Feel free to mix up different hues, but stick to 4 to 6 drops of food coloring total, or else you’ll risk muddying the bath waters.

Using a bath bomb is an easy, relaxing way to upgrade bathtime. Most adults agree it's a lush, spa-like experience and most kids love the fun fizz or rainbow-colored water. But instead of paying ...

The cornstarch in a bath bomb has just one job: It slows down the reaction. By binding to the baking soda as well as the citric acid, the cornstarch slows down the rate at which both of them dissolve.

You can get a bath bomb mold in any shape you desire. You can also use an empty plastic ornament, a candy mold, cupcake tins, or even just a measuring cup.