Melt the pink and blue candy melts in two bowls for 30 second increments, stirring in between, for about 60-90 seconds. Spoon 1 tablespoon of each color into each half sphere mold.
Swirl the two colors together using the back of a spoon or a pastry brush, creating a 'marbled' effect. Set in fridge or freezer until hardened.
Once set, carefully remove each sphere from the mold. If the sides are delicate, you may need to strengthen the top edges with a little of the leftover candy melts.
In 6 of the sphere halves, spoon 1 tablespoon strawberry milk powder, a couple mini marshmallows and some cotton candy.
Warm a small plate in the microwave for 45 seconds. Place one of the empty sphere halves on the plate for a few seconds to let the edges melt.
Place on corresponding, filled half sphere, aligning the edges. Run a clean finger around the edge to smooth it out. Repeat with remaining 5 spheres.
To Make Hot Cocoa
Place a hot chocolate bomb into the bottom of a mug and pour 6 oz of hot milk or water over top. Once the shell is melted, stir to emulsify. Serve immediately and enjoy!