Pop the popcorn and place in a large bowl. Melt the chocolate chips in a microwave-safe bowl, stirring every 20-30 seconds until smooth. Pour the white chocolate into the popcorn and toss to coat. Spread it out on parchment-lined cookie sheets and sprinkle the Pop Rocks (and sprinkles) on the popcorn, before the chocolate has set. Let the popcorn cool completely. You might even want to refrigerate it so that the chocolate hardens (especially if you live in an inferno/Phoenix, like I do).