This Sweet Birthday Party Is Perfect For Any Kiddo Who Loves Rainbows and Hearts. By Kate Stahl. Updated on Aug 4, ... Rainbow-colored, polka-dot balloons from The TomKat Studio's shop.

3 boxes white cake mix 3 cups water, divided 9 egg whites, divided 1 cup vegetable oil, divided Rainbow food coloring Vanilla frosting 1. Preheat oven to 350°.