Making bath bombs is almost as fun and easy as soaking in your tub. Make them as gifts or for yourself and enjoy some fizzy relaxation.

Amethyst & Emerald Geode Ring Bath Bomb, $19.95 each, Pearl Bath Bombs The look isn't the only incredible thing about the bath bombs, either. Every single one comes with a matching ring.

Here's the science behind that satisfying fizz of a bath bomb, plus, how to make your own at home.