Here's a recipe for an easy puffy paint.
- shaving cream
- white glue
- liquid watercolor
Every teacher I know has a slightly different proportion of shaving cream to paint. I add them until it feels good to me when I stir it. The watercolor is added after you like the way the white mixture turned out.
Yes, you can paint with just the shaving cream and the watercolor, which we also do. Adding the glue prevents the shaving cream from disappearing into nothingness when it's dry.