Per Rebecca's request, here are the basic soap recipes. These are really easy and make great gifts.
Bath Salts
You'll need:
Coarse Sea Salt
Soap Fragrance
Soap Coloring
Pour 1/2 cup of salt into a small bowl. Stir in coloring until the salts are the desired color. Next stir in fragrance until the desired scent is reached. That's it. I usually package the salts in a jar unless they're being mailed, then I use a bag. You can find the salt in the health food section at the grocery store and the other supplies at a craft store.
Bath Soaps
You'll need:
Soap mold
Melt and Pour Soap base
Soap Fragrance
Soap Coloring
Cut the soap base into cubes. Put the cubes into a microwaveable cup, and following the directions for the soap, heat in the microwave until melted. Stir in coloring and fragrance until you get the desired color and scent that you want. Pour the soap base into the mold and let harden. After it's finished, pop out the soap and package as desired. All of the above supplies can be found at a craft store.
As you become more comfortable, you can experiment with mixing scents, colors, and ingredients to get different effects. For more ideas, a really good resource is Craft Magazine's Body Care Basics issue.
