Here's what you need:
Approximately 4 ounces of melt and pour soap base
Mini bath puff (I got mine from Parasox on etsy)
Fragrance oil (I used Cherry Blossom from Sahara's Supplies)
Blueberry seeds for exfoliation (also from Sahara)
Bath bomb mold (from...you guessed it!...Sahara)
A spoon for mixing
Knife for cutting
Measuring glass to melt your soap in

First you need to cut up your soap base and measure out 2 ounces. Melt it in the microwave (about 20 seconds should do the trick), add about 1/4 tsp fragrance oil, a bit of blueberry seeds, and mix it all together.
Now, set your mini puff in one half of the bath bomb mold. I recommend greasing the mold a bit so your soap doesn't stick.

Measure out another 2 ounces of your soap base. Melt it and add your fragrance and blueberry seeds like last time. Pour it into the other half of your mold. (Don't forget to grease it!)

Very carefully and very slowly set it into the melted soap, puff side down. You'll want to put something under it to catch the soap that runs out over the side. Trust me, now matter how slow you go it's going to happen.