Bubble painting. Awesome and fun idea. I'm thinking of taking it a bit further with my grandkids and using a large foam core board then after it dries, placing a few photos of the grandkids, maybe even having them each do a separate board of their own and putting individual pictures of each on the board they did. Mod Podge over the top to seal it - wahlah! beautiful individualized wall art!!
Bubble Printing: 1/2 cup of water, 2 Tablespoons of paint, and a few squirts of dish soap in each container. Blow with a straw into the cup to make lots of bubbles pile up on top of the cup - then press paper to the bubbles so they pop and leave bubble prints!
Volcano art. Paint a layer of baking soda paste on watercolor paper. Then add drops of food coloring and spray with vinegar. The picture continually changes as it bubbles and dries. Brush off baking soda when the picture is completely dry. I plan to keep experimenting w/ this project this summer!