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 ...

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.

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.