The tutorial I used for this project instructed to mix watercolor paint with clear bubble solution, but I took a different twist. I used Crayola Washable Colored Bubbles from Walmart and blew them onto a canvas. It was slightly risky because, contrary to the product name, the bubbles are not very washable, and they also never seem to fully dry on the canvas, leaving me with stained fingers. The colors came out more vivid, but it was hard to control the path of the bubbles, which is why there are so few white spots.
Full tutorial here.