First pour some bubbles into a bowl. I used a cereal bowl. Next add a few drops of paint. Then use a straw and blow to get some bubbles. Lots of bubbles without spilling over the edge is ideal. Next take your watercolor paper and place it on the top of the bowl. Remove the bowl after a few seconds and allow the bubbles to pop. You can help them along with the end of a pencil. Here’s what you get.
They are just like clouds. You can see all kinds of shapes. Here I have outlined some.