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 Painting - A squirt of dish soap, 15 drops of neon food colouring, 1/2 c. of water, straws. Using a straw, students blow until they have a huge pile of bubbles. Gently press paper onto the bubbles, allowing them to pop on the paper. Who says it's just for kids?!?