Place 6 graham cracker squares onto a baking sheet and top each with a marshmallow. Bake in the oven for 2 minutes, or until the marshmallows are puffed and beginning to melt. Remove from the oven.
While the marshmallows are still warm, top with sprinkles and a square of white chocolate on top of each marshmallow. Bake in the oven for an additional minute. Remove and top one more time with sprinkles, and let cool for 2 minutes.
Separate your cotton candy into small puffs about the size of a graham cracker square. Add it to the top of each s’more and finish it off with your remaining graham cracker squares. Enjoy immediately!