I created my bubble solution because it was cheaper and arguably more effective than store-bought solutions.
I was inspired by "The Bubble Dad." His videos are a must-see. This one is my favorite.
Concept: Air is a gas that is made up of floating molecules. Soap and water can be mixed to create a film of molecules that stick together. When you blow air through a material that is soaked in bubble solution, you can "catch" the air with a bit of this solution. The solution creates just enough surface tension on the air to create a bubble. The fun part is creating bubbles of all sizes with different materials.
For our project, we made three different types of wands.
(The natural sticks in my area weren't long enough, but maybe I'll collect some in the future to save money!) The string needs to be tied as a loop with something heavy on it. A metal washer works great because it keeps your string separated when creating the bubble. You dip the string into the solution and walk backward or move the wand upward to create a bubble. Wind could be helpful, but also an obstacle!
The SF Exploratorium had a great bubble activity. I'd love to keep collecting materials to make new ways for the kids to explore bubbles like big trays and hula hoops.