When you google bubble painting there are 2 techniques. One involves food coloring and one paint. I decided to try food coloring since I wasn't 100% sure my kids wouldn't accidentally drink the solution. I figured at least food coloring is designed to be eaten (even if it's not great for you), verses paint. I'm sure we could debate whether the non toxic paint or food coloring is worse but meh. No one actually wanted to drink the solution but, as anticipated, one kiddo forgot to take the straw out of their mouth before drawing air and GULP! MOOOOOOOM! oh MOOOOM! it's gross! Yeah, soap is awful to get in our mouth but lesson learned.
You can google for ratios but the basics are - water, dish soap, and food coloring (or paint). Now, learn from me here- if you have trays with edges (like sheet pans) USE THEM. My kids got so into bubbling that they hardly made any prints but made a monstrous mess bubbling over their bowls. The prints are just dropping a sheet of thick paper over the bubbles or touching the paper to the edges of the bubbles. My kids did both and they worked fine. Just be sure to use paint paper b/c anything thinner will tear!
Was the activity worth the mess? Heck yes! My kids had so much fun!