Add the jello powder and cool whip to a large mixing bowl and stir until fully combined.
Add the marshmallow fluff and cottage cheese. Stir well.
Gently fold in remaining ingredients, excluding the garnishes.
To Garnish
Scoop fluff salad into a serving bowl. Position one of the rainbow belts in the middle top of the heap of fluff and surround each end of the rainbow belt with a few mini marshmallows to make clouds. Sprinkle some of the gold sprinkles over the clouds. Randomly place some of the rainbow bites around the bowl, on top of the fluff.