In a large bowl, mix together Corn Chex, Wheat Chex, pretzels, mini marshmallows, and M&Ms.
Melt white chocolate and pour over mixture. Stir until fully coated.
Transfer mixture to a parchment-lined baking sheet or dish and top with sprinkles, then refrigerate until firm, 1 hour.
Break up into bite-size pieces and serve.
Notes- if making as gifts be sure to store in a good air tight bag or jars... for stocking stuffer make on Christmas Eve, after the kids are in bed, that way its done be time you have to put in the stockings... this makes a nice diy gift for anyone, I like to have my kids make it for their close friends as little gifts...
