That was my concern also, so I take them outside where many cars are parked. Some will land on the cars and it concerns me that the owner will get upset, if it will do something to the paint if they don't wash it, so I run over to wipe it off, that is too worrisome so I go to a field. Oh, and when they pop down come these little squiggly sperm looking fishes from the bubble. It's weird.
TLDR: 2 cups warm water, 1/3 cup dish soap, 1/4 cup corn syrup. If you don’t have corn syrup replace it with the same quantity white sugar (dissolve in the warm water first)
When kids blow those bubbles they get accidentally swallowed it and they had a cough chemicals in soap can cause respiratory irritation when I was a kid when I sawllowed a bubble while my brother is blowing it my throat starting to hurt and I had my cough.
to make them harden maybe aply a layer of school glue around it with a brush and it might be hard and glossy and if you need more layers put you can always put more layers
