In Large saucepan, melt butter over low heat.
Add marshmallows and stir until completely melted.
Remove from heat.
Add cereal and stir.
Using a buttered spatula press mixture into a 13x9 baking dish coated with a cooking spray.
Refrigerate until cool. Cut into squares or shapes you like.
Melt chocolate chip morsels in uncovered, microwave safe bowl on high for 1 minute.
Stir. Continue in microwave every 10 seconds until completely melted.
Dunk rice krispie squares into melted chocolate about half way.
Lay on rack and sprinkle your sprinkles on them and let set.
ENJOY!