D.I.Y. Bath Bombs
Bath bombs come in all shapes, sizes, colors and scents. The water-reacting orbs can be given as a gift for almost any occasion: birthdays, Christmas, or congratulations parties.
I, myself, have tried bath bombs, and I absolutely love them. The scents that they give off are calming and help my body relax, along with the colors, which are fascinating.
But how do they work? When the baking soda and citric acid come in contact with water, it creates the foam, which is also known as carbon dioxide bubbles.
This is a recipe for bath bombs from popsci.com:
Tools and Incrediants:
8 oz. baking soda
4 oz. Epsom salt
4 oz. corn starch
4 oz. citric acid
Biodegradable glitter or dried flower petals (optional)
2.5 tablespoons coconut oil (or any other veggie oil)
About 1 tablespoon water
About 2 teaspoons essential oil (for scent)
4-6 drops of food coloring
Small jar or bowl
12-18 silicone molds
First, mix the dry ingredients (baking soda, Epsom salt, corn starch, and citric acid) together in a large bowl. Use the whisk to make sure the mixture is clump-free.
Now mix up the wet ingredients (oil, water, essential oil, and food coloring). The easiest way to get this party started is to put them in a jar and shake them up.
Very slowly add the liquid to the dry mixture. Like a teaspoon at a time. Whisk as you go, and slow down if things start to look fizzy. You should end up with a mixture that just barely clumps together, like damp sand.
Stuff that stuff into your silicone molds, ASAP. You don't want the mix to dry out while it's still in the bowl.
Let the bath bombs dry. If your mold has a lot of details in it, you might just want to give them a whole day to be safe. Then pop them out.
Here's a slideshow of GIFs showing a "Galaxy Bomb" bath bomb as it is dropped into the tub and goes into effect.