Line a 15x10x1-in. pan with parchment; set aside., In a double boiler or metal bowl over hot water, melt chocolate chips until two-thirds are melted. Remove from heat; stir until smooth. Stir in half the ramen, 1/4 cup marshmallows, 3 tablespoons M&M's and 1 tablespoon sprinkles. Spread into prepared pan; top with remaining ingredients (pan will not be full). Refrigerate until firm, 15-20 minutes. Break or cut into pieces. Store in an airtight container.