Over medium heat warm large pot. Melt Butter in pot and then add bags of white chocolate chips. Melt the white chips stirring regularly. 

Once melted remove from heat and stir in the Rice Chex or other plain cereal gently folding it until coated. 

Place half of each powdered sugar in each of 2 Gallon size Baggies. Scoop half of the mixture each of the Gallon Bags. Close the bags, and "fluff" the mixture about until sufficiently coated. Then add sprinkles and fluff a bit more. 

Pour out onto wax paper or parchment covered cookie sheet to cool. Once cool add remaining ingredients and mix about. Serve in a bowl, or small baggies for snacks. Keep well covered or in Ziploc baggies to maintain freshness. Lasts a week...unless your little Leprechauns find it! Then, it will go quite quickly! :)