Put your favorite chocolate, whether it be white, milk, or dark chocolate, and melt it on the stove or in the microwave for 20 second intervals.
Once melted, spoon or paint some chocolate in the mold and spread it around to create a thin layer. Put the chocolate in the freezer for 5 minutes ,then add another layer, making sure the top is thick. Freeze the chocolate again, then remove each half-sphere from the mold.
Fill half of the spheres with hot chocolate mix, marshmallows, candy, etc. Once filled, take the empty half and melt it on a hot skillet for a second. Attach to the filled half and refrigerate immediately.
Once each bomb/ball is made, drizzle with chocolate and decorate with sprinkles or candy!
Put the hot chocolate bomb in a mug and pour hot milk over it. Watch the bomb melt and the marshmallows explode. Enjoy!